Univariate statistical analyses revealed that patients with <i>ERCC2</i> rs13181 T/G and/or <i>CYP3A4</i> rs2740574 A/G genotypes are more likely to develop alopecia; patients with <i>ERCC2</i> rs238406 C/C genotype may develop leukopenia, and patients with <i>GSTT1</i>-null genotype could develop lymphocytopenia (III-IV).