expertos de la Clínica Mayo HCG diet Reported side effects not safe human chorionic gonadotropin side effects mayoclinic.org expertos de la Clínica Mayo expertos de la Clínica Mayo reputed specialists HCG diet: Is it safe and effective? - Mayo Clinic human chorionic gonadotropin Los efectos secundarios side effects Human chorionic gonadotropin Has the HCG been shown to be safe and effective? side effects