Given name: M Family name: Grosblat

a specialist in internal medicine, Zelazna Street No. 81, flat 3. head of Department VI of the Czyste hospital, he delivers a speech during the action for Najman's honour

Warsaw Telephone Directory 1939 (SASTW - Spis Abonentow Sieci Telefonicznej m. st. Warszawy 1939): doctor of medicine, Zurawia Street No. 19, perhaps head of hospital department
is a different doctor of the same surname. In Gazeta Zydowska without a name