Original sentence: In this his investigations returned to the study of histamine and anaphylaxis from his early 1920s work with Dale, and Kellaway was furthermore encouraged by the two-year tenure of expatriate German pharmacologist, Wilhelm Feldberg, at the Hall Institute (1936-38).The Dohme lectures also coincided with a shift in Kellaway's interest towards the effects of tissue injury by venoms, particularly their effects on haemodynamics.This work later led to the subtantial field of leukotriene pharmacology, but for Kellaway the programme was curtailed by the outbreak of World War II
Edited sentence: His investigations thus returned to the study of histamine and anaphylaxis that had characterised his early 1920s work with Dale, while Kellaway was furthermore encouraged by the two-year tenure of expatriate German pharmacologist, Wilhelm Feldberg, at the Hall Institute (1936-38).The Dohme lectures also coincided with a shift in Kellaway's interest towards tissue injury by venoms, particularly their effects on haemodynamics.This work later instigated the subtantial field of leukotriene pharmacology, but for Kellaway the programme was curtailed by the outbreak of World War II