ADAMTS13 and HELLP syndrome: In the study of Yoshida et al., pregnant women with HELLP syndrome were also included in the sample, but the sizes of the patient group (n = 13) and the control group (n = 128) are obviously inequivalent [20] Interestingly, according to von Krogh et al., no statistically significant differences were detected concerning lower levels, genotype, allele, and haplotype of the ADAMTS13 variants between the preeclamptic and the healthy control group of pregnant women [21].