Evaluasi kadar kidney injury molecule-1 kim-1 dan neutrophil gelatinase associated lipocalin ngal dalam urin untuk mendeteksi gangguan fungsi ginjal pada pasien kanker nasofaring dengan kemoterapi berbasis sisplatin = Evaluation of urinary kidney injury molecule 1 kim 1 and neutrophil gelatinase associated lipocalin ngal levels to detect kidney dysfunction in patients with nasopharyngeal cancer treated with cisplatin based chemotherapy