Our bodies have several vital organs that quietly toil away to keep us functioning properly. Among these are the kidneys, two fist-sized organs that sit on either side of the spine below the ribs.

The Danish landscape artist Lili Elvenes (1882-1931), born Einar Wegener and better known as Lili Elbe, and her spouse, the Art Deco portrait artist Gerda Wegener (1886-1940), born Gerda Gottlieb.

3 Centre de Recherche en Epidémiologie et Statistiques (CRESS), Unité Inserm 1153, Université Paris Cité, Paris, France ...