A medical supervisor (e.g. the coordinator of the CTC or his/her assistant) is responsible for several ORPs and rotates between them. The supervisor is in charge of the overall operation of all the ORPs, training, staff information and management, safety of staff and patients, the collection and transmission of data. S/he visits (or can be reached by telephone) every day. Someone should be designated and trained to replace him/her in the event of absence.