“…Although nurses may provide expert advice, in developing countries, for example, services were used as a support tool for village health workers in their day to day care of patients and it was the health worker who was in contact with distant experts [26,27,34,38]. Within developed countries telephone services providing one-off health care advice to patients are usually staffed by experienced registered nurses [23,52], although some are staffed by doctors, or provide a direct referral to a medical specialist [23,33,37,40,45].…”