Tham v?n y khoa: Bác s? Nguy?n Th??ng Hanh · N?i khoa - N?i t?ng quát · B?nh Vi?n ?a Khoa T?nh B?c NinhYour browser isn’t supported any longer. Update it to find the very best YouTube practical experience and our most recent capabilities. Find out more– Hít th? sâu b?ng b?ng và th? ra t? t? b?ng m?i, l?p l?i 15-20 nh?p r?i th? nh? nhàng