SWISS-PROT 40 changed the RX line from RX MEDLINE; 91002678. to RX MEDLINE=93305731; PubMed=7916637; In this case, failure is GOOD! (if you needed Medline cross-references) Need to support the new format.
RX MEDLINE; 91002678.
RX MEDLINE=93305731; PubMed=7916637;
Need to support the new format.