NAIR SANDEEP DAMODHARAN; VIJAYAGOPAL SUNIL KUMAR; PRZUNTEK HORST; WEBERING NADINE; HEGELMAIER TOBIAS. A COMPLEMENTARY APPROACH ON OLFACTORY DYSFUNCTION IN PARKINSONS DISEASE- RETROSPECTIVE OBSERVATIONAL STUDY. International Journal of Ayurveda and Pharma Research, v. 8, n. Supply1, p. 25-32, 24 Oct. 2020.