20 . 
of the people exposed. Detailed points on epidemiological monitoring of lab 
personnel and their close contacts have already been offered in relation to 
surveillance of human cancers among personnel in virus labs (See Biohazards in 
Biological Research, pg. 309, Cold Spring Harbor Lab, 1973). The participation 
of independent expertise (including at least an occupational health and safety 
epidemiologist and a medical microbiologist) not directly involved in cloning 
experiments, is advisable. Participation of the people actually exposed to the 
health hazard including the maintenance and custodial personnel, seems eminently 
reasonable. Formal and educational and training sessions, as called for in the 
Provisional Asilomar Statement, should gradually allow informed participation 
of the non-experts in the laboratory. 
[ 371 ] 
