James P, Gupta R, Christopher DJ, Thankagunam B, Veeraraghavan B. MDR- and XDR-TB among suspected drug-resistant TB patients in a tertiary care hospital in India. Clin Respir J. 2011 Jan;5(1):19-25. doi: 10.1111/j.1752-699X.2009.00184.x. PMID: 21159137.

Christopher DJ, Dinakaran S, Gupta R, James P, Isaac B, Thangakunam B. Thoracoscopic pleural biopsy improves yield of Xpert MTB/RIF for diagnosis of pleural tuberculosis. Respirology. 2018 Jul;23(7):714-717. doi: 10.1111/resp.13275. Epub 2018 Feb 27. PMID: 29486527.

Christopher DJ, Daley P, Armstrong L, James P, Gupta R, Premkumar B, Michael JS, Radha V, Zwerling A, Schiller I, Dendukuri N, Pai M. Tuberculosis infection among young nursing trainees in South India. PLoS One. 2010 Apr 29;5(4):e10408. doi: 10.1371/journal.pone.0010408. PMID: 20454447; PMCID: PMC2861589.

Bal SK, Gupta R, Irodi A, Nair A, Mathew J, Thangakunam B, Christopher DJ. To immunosuppress or not: Behcet's syndrome presenting as an eosinophilic pleural effusion. Lung India. 2017 Sep-Oct;34(5):457-460. doi: 10.4103/lungindia.lungindia_471_16. PMID: 28869232; PMCID: PMC5592759.

Vyas S, Thangakunam B, Gupta R, Michael JS, Christopher DJ. Interferon gamma release assay and tuberculin skin test positivity in sarcoidosis. Lung India. 2015 Jan-Feb;32(1):91-2. doi: 10.4103/0970-2113.148467. PMID: 25624613; PMCID: PMC4298936.

Gnanadurai R, Ninan MM, Arul AO, Sam AS, James P, Gupta R, Michael JS. Challenges in the management of slowly growing non-tuberculous mycobacteria causing pulmonary disease: Perspectives from a high burden country. Indian J Med Microbiol. 2021 Aug 10:S0255-0857(21)04179-7. doi: 10.1016/j.ijmmb.2021.07.005. Epub ahead of print. PMID: 34389186.

James P, Gupta R, Christopher DJ, Thankagunam B, Veeraraghavan B. MDR- and XDR-TB among suspected drug-resistant TB patients in a tertiary care hospital in India. Clin Respir J. 2011 Jan;5(1):19-25. doi: 10.1111/j.1752-699X.2009.00184.x. PMID: 21159137.

Christopher DJ, Dinakaran S, Gupta R, James P, Isaac B, Thangakunam B. Thoracoscopic pleural biopsy improves yield of Xpert MTB/RIF for diagnosis of pleural tuberculosis. Respirology. 2018 Jul;23(7):714-717. doi: 10.1111/resp.13275. Epub 2018 Feb 27. PMID: 29486527.

Christopher DJ, Daley P, Armstrong L, James P, Gupta R, Premkumar B, Michael JS, Radha V, Zwerling A, Schiller I, Dendukuri N, Pai M. Tuberculosis infection among young nursing trainees in South India. PLoS One. 2010 Apr 29;5(4):e10408. doi: 10.1371/journal.pone.0010408. PMID: 20454447; PMCID: PMC2861589.

Bal SK, Gupta R, Irodi A, Nair A, Mathew J, Thangakunam B, Christopher DJ. To immunosuppress or not: Behcet's syndrome presenting as an eosinophilic pleural effusion. Lung India. 2017 Sep-Oct;34(5):457-460. doi: 10.4103/lungindia.lungindia_471_16. PMID: 28869232; PMCID: PMC5592759.

Vyas S, Thangakunam B, Gupta R, Michael JS, Christopher DJ. Interferon gamma release assay and tuberculin skin test positivity in sarcoidosis. Lung India. 2015 Jan-Feb;32(1):91-2. doi: 10.4103/0970-2113.148467. PMID: 25624613; PMCID: PMC4298936.

Gnanadurai R, Ninan MM, Arul AO, Sam AS, James P, Gupta R, Michael JS. Challenges in the management of slowly growing non-tuberculous mycobacteria causing pulmonary disease: Perspectives from a high burden country. Indian J Med Microbiol. 2021 Aug 10:S0255-0857(21)04179-7. doi: 10.1016/j.ijmmb.2021.07.005. Epub ahead of print. PMID: 34389186.

Abhilash KPP, Mathiyalagan P, Krishnaraj VRK, Selvan S, Kanagarajan R, Reddy NP, Rajendiran N, Hazra D, Gunasekaran K, Moorthy M, Jasmine S, Davis JP, George T, George K, Varghese GM, Rupali P, Barney Isaac TJ, Gupta R, Pichamuthu K, Joy M, Jayaseelan L, Mathews P, Peter JV. Impact of prior vaccination with CovishieldTM and Covaxin® on mortality among symptomatic COVID-19 patients during the second wave of the pandemic in South India during April and May 2021: a cohort study. Vaccine. 2022 Feb 10:S0264-410X(22)00157-8. doi: 10.1016/j.vaccine.2022.02.023. Epub ahead of print. PMID: 35168837; PMCID: PMC8828422.

Gupta R, Aru.l AO, Sasikumar JR, Prabhu AJ, James P Imprint Cytology of Thoracoscopic Pleural Biopsy Tissue for Early Etiological Diagnosis of Pleural Effusion: A Pilot Study From India. J Bronchology Interv Pulmonol. 2021 Apr 1;28(2):98-102. doi: 10.1097/LBR.0000000000000724. PMID: 33122599.

S D, S TD, Gupta R, Varughese S, Varghese GM, George B, Michael JS. Effectiveness of a real-time PCR for diagnosis of Pneumocystis pneumonia in immunocompromised patients - Experience from a tertiary care center, India J Mycol Med. 2022 May;32(2):101241. doi: 10.1016/j.mycmed.2021.101241. Epub 2021 Dec 30. PMID: 34999296.

Varghese R, Basu S, Neeravi A, Pragasam A, Aravind V, Gupta R, Miraclin A, Ramaiah S, Anbarasu A, Veeraraghavan B. Emergence of Meropenem Resistance Among Cefotaxime Non-susceptible Streptococcus pneumoniae: Evidence and Challenges. Front Microbiol. 2022 Feb 3;12:810414. doi: 10.3389/fmicb.2021.810414. PMID: 35185834; PMCID: PMC8853538.

Isaac BTJ, Priya N, Nair AA, Thangakunam B, Balachandran A, George T, Thomas SM, George TK, Iyadurai R, Kumar SS, Zachariah A, Singh B, Rupali P, Pichamuthu K, Gupta R, Daniel J, Sasikumar JR, Chandy ST, Christopher DJ. Treatment of COVID-19 Acute Respiratory Distress Syndrome With a Tabletop Noninvasive Ventilation Device in a Respiratory Intermediate Care Unit. Mayo Clin Proc Innov Qual Outcomes. 2022 Jun;6(3):239-249. doi: 10.1016/j.mayocpiqo.2022.04.001. Epub 2022 Apr 19. PMID: 35463482; PMCID: PMC9015959.

Kaswala C, Schmiedel Y, Kundu D, George MM, Dayanand D, Devasagayam E, Manesh S A, Kumar SS, Michael JS, Ninan MM, Chacko G, Zachariah A, Sathyendra S, Hansdak SG, Iyadurai R, Christopher DJ, Gupta R, Karthik R, Abraham OC, Varghese GM. Accuracy of Gene Xpert MTB/RIF Ultra for the diagnosis of tuberculosis in adult patients: A retrospective cohort study. Int J Infect Dis. 2022 Jul 7:S1201-9712(22)00410-6. doi: 10.1016/j.ijid.2022.07.016. Epub ahead of print. PMID: 35811084.

Daniel J, Gupta R, Thangakunam B, Christopher DJ. Undiagnosed Asthma-COPD overlap among patients diagnosed as Asthma and COPD in a referral hospital, India. Heliyon. 2023 Mar 22;9(4):e14711. doi: 10.1016/j.heliyon.2023.e14711. PMID: 37025820; PMCID: PMC10070599.

Kaswala C, Schmiedel Y, Kundu D, George MM, Dayanand D, Devasagayam E, S AM, Kumar SS, Michael JS, Ninan MM, Chacko G, Zachariah A, Sathyendra S, Hansdak SG, Iyadurai R, Christopher DJ, Gupta R, Karthik R, Abraham OC, Varghese GM. Accuracy of Xpert MTB/RIF Ultra for the diagnosis of tuberculosis in adult patients: a retrospective cohort study. Int J Infect Dis. 2022 Sep;122:566-568. doi: 10.1016/j.ijid.2022.07.016. Epub 2022 Jul 8. PMID: 35811084.

Rosemol Varghese​, Binesh Lal Yesudhason, Leena Robinson Vimala​, Ayyanraj Neeravi​, Kavipriya Anandhan​, Pavithra Baskar​, Divyaa Elangovan​, Abi Manesh​, Prince James, Richa Gupta, Balaji Veeraraghavan. Pneumococcal serotypes causing non-invasive pneumonia in adults from a South Indian tertiary care hospital and the impact of the newer conjugate vaccines ACCESS MICROBIOLOGY Volume 3, Issue 12.https://doi.org/10.1099/acmi.0.000258

Biswas SS, Gupta R, Vanjare HA, Bose S, Patel JA, Selvarajan S, Aaron J, Nitya E, Iyer DS, Jacob NS, John KR, Jacob KS. Depression in the elderly in Vellore, South India: the use of a two-question screen. Int Psychogeriatr. 2009 Apr;21(2):369-71. doi: 10.1017/S1041610208008259. Epub 2009 Jan 13. PMID: 19138461.

Chhajed PN, Nene A, Abhyankar N, Akkaraju J, Agarwal R, Arora S, Bhat R, Chawla R, Christopher DJ, Chowdhary SR, Dhar R, Dhooria S, Goyal R, Gupta R, James P, Koul PA, Khader AKA, Madan K, Marwah V, Mehta R, Mohan A, Nangia V, Patel D, Pattabhiraman VR, Sehgal IS, Singh S, Srinivasan A, Swarnakar R, Tampi S. Conventional flexible bronchoscopy during the COVID pandemic: A consensus statement from the Indian Association for Bronchology. Lung India. 2021 Mar;38(Supplement):S105-S115. doi: 10.4103/lungindia.lungindia_953_20. PMID: 33686993; PMCID: PMC8104343.

Nair AA, Gupta R, James P, Irodi A, Christopher DJ, Thangagunam B. The safety and tolerability of pirfenidone in Indian patients with idiopathic pulmonary fibrosis. Curr Med Issues 2022;20(1):27-31. DOI: 10.4103/cmi.cmi_89_21

Vyas S, Thangakunam B, Gupta R, Michael JS, Christopher DJ. Interferon gamma release assay and tuberculin skin test positivity in sarcoidosis. Lung India. 2015 Jan-Feb;32(1):91-2. doi: 10.4103/0970-2113.148467. PMID: 25624613; PMCID: PMC4298936.

Thangakunam B, Roger J, Isaac B, Mangal D, Barney A, Gupta R, Christopher DJ. Dyspnoea in patients presenting to post-COVID respiratory clinic not fully explained by lung function impairment and chest radiography abnormalities. Lung India. 2023 May-Jun;40(3):296-298. doi: 10.4103/lungindia.lungindia_554_22. PMID: 37148036; PMCID: PMC10298822.

Abhilash KPP, Mathiyalagan P, Krishnaraj VRK, Selvan S, Kanagarajan R, Reddy NP, Rajendiran N, Hazra D, Gunasekaran K, Moorthy M, Jasmine S, Davis JP, George T, George K, Varghese GM, Rupali P, Barney Isaac TJ, Gupta R, Pichamuthu K, Joy M, Jayaseelan L, Mathews P, Peter JV. Impact of prior vaccination with CovishieldTM and Covaxin® on mortality among symptomatic COVID-19 patients during the second wave of the pandemic in South India during April and May 2021: a cohort study. Vaccine. 2022 Mar 18;40(13):2107-2113. doi: 10.1016/j.vaccine.2022.02.023. Epub 2022 Feb 10. PMID: 35168837; PMCID: PMC8828422.

A. A. Nair, A. Raja, A. J. Devasia, L. R. Vimala, R. Gupta, B. Thangakunam and V. Mathews Thoracic air leak syndrome as the sole manifestation of chronic lung graft-versus-host disease: a case report The Egyptian Journal of Bronchology.16, 60 (2022) Link

Nellimootil MV, Joseph TJ, Gupta R, Nair AA, James P, Irodi A. Spontaneous pneumothorax in metastatic osteosarcoma: a case series. The Egyptian Journal of Bronchology. 2022;16(1):61. doi: 10.1186/s43168-022-00165-3. Link

Nair AA, Vimala LR, Chandran D, Gupta R. ABPA sans asthma: an entity to remember. BMJ Case Rep. 2022 Nov 25;15(11):e252658. doi: 10.1136/bcr-2022-252658. PMID: 36428029; PMCID: PMC9703309.

Naina P, Perumalla SK, Gupta R, Prakash JAJ. Performance of EAST in diagnosing inhalant allergens in children with allergic rhinitis. Indian J Med Microbiol. 2022 Oct-Dec;40(4):593-595. doi: 10.1016/j.ijmmb.2022.06.005. Epub 2022 Jul 2. PMID: 35787333.

S D, S TD, Gupta R, Varughese S, Varghese GM, George B, Michael JS. Effectiveness of a real-time PCR for diagnosis of Pneumocystis pneumonia in immunocompromised patients - Experience from a tertiary care center, India. J Mycol Med. 2022 May;32(2):101241. doi: 10.1016/j.mycmed.2021.101241. Epub 2021 Dec 30. PMID: 34999296.

Gupta R, James P, Thangakunam B, Christopher DJ. Medical thoracoscopic removal of a metal needle from the pleural space. BMJ Case Rep. 2014 Oct 9;2014:bcr2014207035. doi: 10.1136/bcr-2014-207035. PMID: 25301430; PMCID: PMC4195211.

Williams BE, Nair AA, James P, Isaac B, Gupta R, Ashok A. Fat emboli-Related diffuse alveolar haemorrhage (FEDAH) an acronym to remember-Case series. Respirol Case Rep. 2023 Sep 8;11(10):e01214. doi: 10.1002/rcr2.1214. PMID: 37692762; PMCID: PMC10485911.

S B MJ, Chacko B, Selvarajan S, Peter JV, Geevar T, Dave RG, Georgy JT, Zachariah A, George T, Sathyendra S, Hansdak SG, Krishnaswami RK, Thangakunam B, Gupta R, Karuppusami R, Nair SC, Srivastava A. Biomarkers of coagulation, endothelial, platelet function, and fibrinolysis in patients with COVID-19: a prospective study. Sci Rep. 2024 Jan 23;14(1):2011. doi: 10.1038/s41598-024-51908-9. PMID: 38263377; PMCID: PMC10805716.

Nair AA, Gupta R, Irodi A, Ashwin Oliver A, Chandran D, Thangakunam B, James P. Tracheobronchopathia Osteochondroplastica - to Biopsy or not to Biopsy? A Relook at The Rare Disease. J Bronchology Interv Pulmonol. 2024 Jan 1;31(1):57-62. doi: 10.1097/LBR.0000000000000931. PMID: 37249571.

Christopher DJ, Isaac BTJ, John FB, Shankar D, Samuel P, Gupta R, Thangakunam B. Impact of post-COVID-19 lung damage on pulmonary function, exercise tolerance and quality of life in Indian subjects. PLOS Glob Public Health. 2024 Feb 1;4(2):e0002884. doi: 10.1371/journal.pgph.0002884. PMID: 38300923; PMCID: PMC10833535.

Christopher DJ, Gupta R, Thangakunam B, Daniel J, Jindal SK, Kant S, Chhajed PN, Gupta KB, Dhooria S, Chaudhri S, Chaudhry D, Patel D, Mehta R, Chawla RK, Srinivasan A, Kumar A, Bal SK, James P, Roger JS, Nair AA, Katiyar SK, Agarwal R, Dhar R, Aggarwal AN, Samaria JK, Behera D, Madan K, Singh RB, Luhadia SK, Sarangdhar N, Souza G, Nene A, Paul A, Varghese V, Rajagopal TV, Arun M, Nair S, Roy DA, Williams BE, Christopher SA, Subodh DV, Sinha N, Isaac B, Oliver AA, Priya N, Deva J, Chandy ST, Kurien RB. Pleural effusion guidelines from ICS and NCCP Section 1: Basic principles, laboratory tests and pleural procedures. Lung India. 2024 May 1;41(3):230-248. doi: 10.4103/lungindia.lungindia_33_24. Epub 2024 Apr 30. PMID: 38704658.

Marimuthu PK, Georgy JT, Philip DSJ, John AO, Joel A, Thumaty DB, Chacko RT, Jambunathan P, Thomas Z, Harikrishna K, Isiah R, Pavamani SP, Sasidharan B, Mathew M, Alex Kodiatte T, Irodi A, Thangakunam B, Isaac BTJ, Gupta R, Rani J, Singh A. Real-World Outcomes of Induction Chemotherapy With or Without Low-Dose Nivolumab for Stage III Non-Small Cell Lung Cancer Ineligible for Up-Front Local Therapy: A Propensity Score-Matched Analysis. JCO Glob Oncol. 2025 Mar;11:e2400256. doi: 10.1200/GO-24-00256. Epub 2025 Mar 24. PMID: 40127380.