Kathleen I. Pritchard (1956-), Canadian oncologist, breast cancer researcher and noted as one of Reuter's most cited scientists. Frieda Robscheit-Robbins (1888-1973), German-American pathologist Ora Mendelsohn Rosen (1935–1990), American medical researcher Una Ryan, (1941) Malaysian born-American, heart disease researcher, biotech vaccine and diagnostics maker/marketer Una M. Ryan, (1966) patented DNA test identifying the protozoan parasite Cryptosporidium Velma Scantlebury, (1955) first woman of African descent to become a transplant surgeon in the U.S.