Hubungan polimorfisme gen matrix metalloprotein-9 -1562 C>T dan 836 A>G terhadap perkembangan penyembuhan luka penderita ulkus kaki diabetes mellitus tipe 2 di RSCM = The relations of matrix metalloprotein 9 1562 C>T and 836 A>G gene polymorfism with diabetic foot ulcer healing progress in diabetic patient at Cipto Mangunkusumo Hospital