Effect of Storage Duration on the Stability of Aliquot and Non-Aliquot Commercial Control Serum Levels in Creatinine Examination: Perbedaaan Lama Waktu Penyimpanan Terhadap Stabilitas Kadar Serum Kontrol Komersial Aliquot dan Non Aliquot Dalam Pemeriksaan Kreatinin. medicra. 2026;9(1):45-53. doi:10.21070/medicra.v9i1.1832