Pharmaceutical consultancy via electronic media; medical consultancy via electronic media; consultancy in the field of medicine via electronic media; medical consultancy in the preoperative phase of prosthetic surgery, in particular endoprosthetic surgery, via electronic media; medical consultancy in the postoperative phase of a prosthetic operation, in particular endoprosthetic surgery, via electronic media; medical consultancy in the field of preparing prosthetic operations, in particular e...