Make get_pii and get_doi call a general function
Make get_pii and get_doi call a general function

johnbachman/belpy,johnbachman/indra,bgyori/indra,bgyori/indra,johnbachman/indra,bgyori/indra,sorgerlab/belpy,sorgerlab/belpy,johnbachman/indra,sorgerlab/indra,sorgerlab/indra,sorgerlab/indra,johnbachman/belpy,sorgerlab/belpy,johnbachman/belpy