PDGF-A, platelet-derived growth factor subunit A|PDGF-A (S1)|platelet-derived growth factor A chain long form|platelet-derived growth factor A chain short form type 1|platelet-derived growth factor A chain short form type 2|platelet-derived growth factor A-chain|platelet-derived growth factor alpha polypeptide, platelet-derived growth factor alpha polypeptide, PDGF-alpha