Application of a Non-Linear multi-model Ayurveda Intervention in elderly COVID-19 patients- a retrospective case series oleh K.S. Dinesh, P.K. Nazeema, Madhavi Archana, K. Jayakrishnan, A.S. Santhi Krishna, S. Swapna Chitra, V.K. Sujitha, Anju Sathian, M. Girish Babu, Geethu Balakrishnan, C. Krishnendhu