Goel, Nitin, Sonam Spalgais, Parul Mrigpuri, Madhu Khanna, Balakrishnan Menon, and Raj Kumar. “Characteristics of COVID-19 at a Non-COVID Tertiary Pulmonary Care Centre in Delhi, India”. Monaldi Archives for Chest Disease 90, no. 4 (November 9, 2020). Accessed June 23, 2021. https://monaldi-archives.org/index.php/macd/article/view/1568.