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Kinugawa, Koichiro; Nakata, Eisuke; Hirano, Takahiro; Kim, Seongryul (2022). "Tolerability of the Intravenously Administered Tolvaptan Prodrug, OPC-61815, in Patients with Congestive Heart Failure Who Have Difficulty with, or Are Incapable of, Oral Intake (TRITON-HF) ― A Phase III, Multicenter, Open-Label Trial ―". Circulation Journal. doi:10.1253/circj.CJ-21-0926. பப்மெட்:35264514.
Sato, Naoki; Uno, Shingo; Yamasaki, Yumiko; Hirano, Takahiro; Kim, Seongryul; OPC-61815 Investigators (2022). "Pharmacokinetics, Pharmacodynamics, Efficacy, and Safety of OPC-61815, a Prodrug of Tolvaptan for Intravenous Administration, in Patients with Congestive Heart Failure ― A Phase II, Multicenter, Double-Blind, Randomized, Active-Controlled Trial ―". Circulation Journal86 (4): 699–708. doi:10.1253/circj.CJ-21-0430. பப்மெட்:34511586.