Correction to Normalized Diurnal and Between-Day Trends in Illicit and Legal Drug Loads that Account for Changes in Population

摘要

We thank Phong Thai and Jochen Mueller for pointing out an error in our calculations that combined measured creatinine loads (kg) associated with a municipality's wastewater together with a reported range in human urine output (L_(urine)/d) to estimate the municipality's population. The resulting estimated population was then compared to the census-based population. In addition, the original article erroneously reported a value 1.7 Lurjne/person ~* day instead of 1.6 in Table S8 as the upper value in the range of human urine output (1.1 ± 0.5 L/person ~* day) reported by Murakami et al. Corrected calculations indicate that the upper range of population estimated from creatinine measurements in wastewater is greater than originally reported. For example, on Wednesday the estimated population compared to the census-based population is 27-73% (Table S8) compared to 26-49% in the original report.