Columbia subject headings:
Discoveries in science.
Medical innovations--History.
Medicine--History.
Medicine--Research--History.
Serendipity.
Harvard subject headings:
Discoveries in science.
Medical innovations--History.
Medicine--History
Medicine--Research--History
Serendipity.
Princeton subject headings:
Discoveries in science.
Medical innovations--History.
Medicine--History.
Medicine--Research--History.
Serendipity.