Additionally, protein post-translational glycosylation-mediated association between the levels of von Willebrand factor (vWF) and ABO blood groups has been established [52]
Nasiadek M, Danilewicz M, Sitarek K, Swiatkowska E, Darago A, Stragierowicz J, et al
The assay precision, accuracy, and linearity of dilution were evaluated, establishing a working range from 400 ng/mL to 20,000 ng/mL, which defines the lower and upper limits of quantification
A different randomized, double-blind, placebo-controlled clinical trial demonstrated that daily oral administration of equal-lower doses (5 g/day) of l-ARG for a shorter period (6 weeks) compared to the current study induced a significant subjective improvement of penile erectile function, as assessed through standardized OLeary questionnaire for ED, although without a significant improvement of penile vascular parameters assessed by basal PDU, in 29 middle-aged/elderly men affected by organic ED of mixed etiology and unknown severity, therefore reporting, in line with the results of the current study, a discrepancy between subjective and objective improvement in erectile function [28]
The implications are significant
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