138. In medical biology laboratories:(a) prescriptions as well as examination reports in the pathological anatomy sector must be kept for a period of at least 10 years; they must be kept for a period of at least 2 years in other sectors;
(b) osseous marrow lamina, histological cuttings and paraffin blocks containing tissues must be kept for a period of at least 10 years;
(c) the director is responsible for the implementation of the administrative mechanisms which will permit identification, without any possibility of error, of the person examined with the samples taken from that person; he must have work sheets allowing him to refer to the source for the identification of any person; each work sheet must include the following information: the date, name of the employee who made the analysis and details of the calculations which were made, where applicable;
(d) the director must keep at the disposal of the staff a register indicating, for each method used, the reference of the technique, the different stages of the technique, the reactives used, the method for testing instruments, as well as the standard values;
(e) every test curve established for the reading of an analysis must include the date and name of the person who established it; and
(f) all test curves must be reviewed periodically.