Occupational asthma as identified by the surveillance of work-related and occupational respiratory diseases programme in South Africa Author: Hnizdo E, Esterhuizen TM, Rees D, Lalloo UG. Source: Clin Exper Allergy. 2001;31(1):32-39. Babalwa Jekwa2019-04-03T12:26:47+02:00Dec 31st, 2001| Share This Page, Choose Your Platform! FacebookTwitterLinkedInWhatsappEmail