Tirtha Ratan Ghosh, Suman Sarkar, Debarati Goswami, Saptaki Majumder and Debasish Saha 2023. Validation of two preoxygenation techniques, 3 min tidal volume breath and eight vital capacity breath techniques in tribal and non-tribal population of Eastern India. Asian Journal of Medical Sciences. 14, 5 (May 2023), 29–34. DOI:https://doi.org/10.3126/ajms.v14i5.50930.