Respected sir , thank you for todays class...i am first year medicine resident..and you are definitely helping to understand very basic things in clinical medicine..thank you sir.
@dsk_graphy343Ай бұрын
Immense gratitude 🙏🙏
@drnarendraverma2Ай бұрын
1 pack is 20 cigarettes so 1 pack year is smoking 20 cigarettes per day for 1 year