Prevalence and associated factors of moderate to severe erectile dysfunction among adult men in Malaysia oleh Muhammad Solihin Rezali, Mohamad Fuad Mohamad Anuar, Mohamad Aznuddin Abd Razak, Zhuo Lin Chong, Azli Baharudin Shaharudin, Mohd Shaiful Azlan Kassim, Mohamed Ashraf Mohamed Daud, Shaiful Bahari Ismail, Zakiah Mohd Said