A Hong Kong doctor and a clinic operator were arrested on Thursday in a joint operation by police and health authorities on a Causeway Bay medical facility suspected of performing high-risk hair transplant procedures without a valid licence. Authorities raided the clinic located in the Cameron Commercial Centre on Hennessy Road after receiving a tip-off that it was offering Regenera Activa (RGA) – an autologous cell transplant treatment for hair loss – despite not having the required day...