stdClass Object ( [pmcid] => PMC7841578 [pmid] => 33502454 [doi] => 10.1001/jamacardio.2020.7238 ) 1stdClass Object ( [pmcid] => PMC7050141 [pmid] => 32122404 [doi] => 10.1186/s13104-020-04967-w ) 1 test

Id not found: 10.1134/S1607672920010147

PMID: 33502454 ; DOI: 10.1001/jamacardio.2020.7238 ; PMC: PMC7841578

PMID: 32122404 ; DOI: 10.1186/s13104-020-04967-w ; PMC: PMC7050141