text: <unk>  (20 August 1891, Charlottenburg -21 December 1969, Leiden) was a German dermatologist who first described many skin diseases and was one of the inventors of the twin study.
option_0: Hermann Werner Siemens
option_1: Nicholas J. Vogelzang
option_2: Eugen Bleuler
option_3: Salvador Luria
option_4: Karl Jaspers
option_5: Geneticist
option_6: Steven Rosenberg
option_7: Elaine Gottschall