Occupational Health - Public
Health Poster Session
Preclinical Diagnosis of Chronic Obstructive Bronchitis in, Workers Exposed to Occupational Pneumotropic Pollutant -Comments,
We are aking you if the applied questionnaire is compatibile with the European Communitty Questionnaire (British Medical Reasearch Council)?
We are wondering if there is not a high difference between the number of subjects in Control Group and the number of subjects in Studied group?
Wed Dec 9