2.3. Study physicians
acupuncture/acupressure
Both study physicians (JS and JK) fulfill the following requirements: knowledge of data protection, ICH-good clinical practice guidelines, content and procedure of the study, and instructions for the study interventions. They received detailed instruction and supervision by long-standing experts in hydrotherapy according to Kneipp and acupuncture/acupressure. The study physicians all had specialist medical training (German: “Facharztausbildung”) with at least 10 years of professional experience.