. "PMC7399962" . "Durneva, Polina" . . "Eysenbach, Gunther" . "cc-by" . "Martin, Patrick" . . "Cousins, Karlene" . "Sheets, Lincoln" . . "The Current State of Research, Challenges, and Future Research Directions of Blockchain Technology in Patient Care: Systematic Review" . . . "J Med Internet Res" . . "32706668" . "10.2196/18619" . "PMC" . "Chen, Min" . . "2020-07-20"^^ . "32706668" .