make pmc uri harvesting backwards compatible with old pmc data
make pmc uri harvesting backwards compatible with old pmc data

mehanig/scrapi,felliott/scrapi,felliott/scrapi,alexgarciac/scrapi,fabianvf/scrapi,CenterForOpenScience/scrapi,erinspace/scrapi,erinspace/scrapi,jeffreyliu3230/scrapi,CenterForOpenScience/scrapi,mehanig/scrapi,fabianvf/scrapi