Tissue response and in vivo degradation of selected polyhydroxyacids: polylactides (PLA), poly(3-hydroxybutyrate) (PHB), and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHB/VA) - Gogolewski, S; Jovanovic, M; Perren, SM; Dillon, JG; Hughes, MK (J Biomed Mater Res, 1993)