World Health Organization Integrated Care for Older People (ICOPE) and the Integrated Care of Older Patients with Frailty in Primary Care (ICOOP_Frail) Study in Korea oleh Chang Won Won, Eunmi Ha, Eunjin Jeong, Miji Kim, Juhyun Park, Ja Euk Baek, Sungouk Kim, Sung Bae Kim, Jihun Roh, Jee Hye Choi, Seung Youn Jeon, Heeeun Jung, Daehyun Lee, Yuri Seo, Hyungeun Shin, Heesun Kim