Singh, Komal, Harshit Kadnur, Animesh Ray, Puneet Khanna, Akhil Singh, Naveet Wig, and Anjan Trikha. 2020. “Platypnea-Orthodeoxia in a Patient With Severe COVID-19 Pneumonia”. Monaldi Archives for Chest Disease 90 (4). https://doi.org/10.4081/monaldi.2020.1609.