Assessing knowledge, acts of discrimination, stigmatizing attitudes and its associated factors towards people living with HIV (PLHIV) among family medicine trainees in Malaysia by Chan, Hiang Ngee, Mohamad, Anuar, Abdul Rashid, Aneesa, Ho, Bee Kiau, Abdul Aziz Cooper, Alia, Mukhtar Aajamer, Haslina, Noor Emjah, Ermi, Krishnan, Jashithra Syamala, Hwee, Gloria Neo Lih