IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-9-11-31827 Original Research Paper Study Prevalence of subgroups of A & detection of anti A1 antibodies in patients admitted in a teaching tertiary care hospital, North Karnataka region Jeeva Priya.M.R Dr. Dr. Vidya N Ronghe Dr. November 2020 9 11 01 02