Name | Info | Provider | Link |
---|---|---|---|
free resource | HighWire | https://jcp.bmj.com/lookup/pmidlookup?view=long&pmid=4019805 | |
free resource | PubMed Central | https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/4019805/ | |
free resource | Europe PubMed Central | https://europepmc.org/abstract/MED/4019805 |