Alterations in Tryptophan Metabolism Affect Vascular Functions: Connected to Ageing Population Vulnerability to COVID-19 Infection?. (March 2022) - Mahalakshmi, Arehally M; Paneyala, Shasthara; Ray, Bipul; Essa, Musthafa Mohamed; Dehhaghi, Mona; Heng, Benjamin; Guillemin, Gilles J; Babu Chidambaram, Saravana