The following list is an overview on subspecialties and needs to be sorted and explained. Entries on individual diseases and organs could be moved to specific articles and definitions added to this page
... Bahlsen[?], biscuit[?] producer (+ 1985)
April 3 - Sally Rand[?], dancer (+ 1979)
April 7 - Ralph Bunche[?], diplomat, winner of the Nobel Peace Prize
April 16 - ...