TY - JOUR T1 - Association of occupational and environmental clinics exposure code system and criteria for substances that cause work-related asthma JF - Occupational and Environmental Medicine JO - Occup Environ Med SP - 287 LP - 288 DO - 10.1136/oemed-2021-108174 VL - 79 IS - 4 AU - Katherine H Kirkland AU - Kenneth D Rosenman Y1 - 2022/04/01 UR - http://oem.bmj.com/content/79/4/287.abstract N2 - The Association of Occupational and Environmental Clinics (AOEC) is made up of more than 50 occupational and environmental member clinics, which although predominately in the USA includes clinics in other countries. AOEC has developed many educational and clinical resources since its beginning in 1988. Almost all of these resources are accessible by all practitioners.In 1991, the AOEC developed a database system for use by AOEC clinics to help identify emerging occupational and environmental health concerns. This database included diagnostic and exposure data on occupational and environmental illnesses and injuries for patients seen in member clinics. The clinical information in the database is not available to all practitioners due to privacy concerns.By 1993, AOEC recognised the need for a more standardised and flexible coding system for exposures in clinical settings. In 1995, an epidemiologist, and an industrial hygienist, developed an exposure classification (EC) system for use by clinicians that included not only chemicals but other hazards (Hunting, McDonald, 1995).1 The EC-List is not an official document of any governmental agency and is available without charge at www.aoecdata.org . The EC-List is searchable, downloadable and an open source. Roughly half of the exposures have no Chemical Abstracts Service (CAS) number. Synonyms include common commercial names. Not all substances with CAS numbers are listed in the EC-List primarily since only substances that have been associated with adverse health effects by users of the … ER -