(a) an anamnesis directed towards the risks to which the employee may be exposed and relating to:i. the possible existence of hereditary diseases or defects;
ii. possible blood count abnormalities; and
iii. an estimate of occupationally derived x-ray dose equivalents received previously. If, for a given period of the professional life of a person, previously directly assigned to work under x-rays, the accumulated dose equivalent is not known with certainty, it shall be considered equal to the maximum permissible dose prescribed in Schedule 8 corresponding to such period;