23. A physician may not refuse to examine or treat a patient solely for reasons related to the nature of the patient’s deficiency or illness, or because of the race, colour, sex, pregnancy, civil status, age, religion, ethnic or national origin, or social condition of the patient, or for reasons of sexual orientation, morality, political convictions, or language; he may, however, refer the patient to another physician if he considers it to be in the patient’s medical interest.