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Have a nice day after watching the Doctor Friends video 😁 Subscription is healthy ♥ The links to the History of Medicine book are Yes https://www.yes24.com/Product/Goods/1... Kyobo https://product.kyobobook.co.kr/detai... Aladdin https://www.aladin.co.kr/shop/wproduc... Thank you! Doctor Friends' YouTube video production is with #DittoCommunications. https://dittostudio.kr/ Intro music lyrics and composition - Stella Jang (Thank you!!👍❤)