Effectiveness of a targeted primary preventive intervention in a high-risk group identified using an efficiency score from data envelopment analysis: a randomised controlled trial... by Hiroko Endo, Hiroto Narimatsu, Sho Nakamura, Satoru Kanda, Emiko Yamada, Miki Kido, Shoko Sato, Iku Ogawa, Rina Inoue, Masanori Togashi, Ken Izumiya

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