In fact, other variables which could have had an impact on the outcomes of interest (such as duration of diabetes, treatment provider, BMI or the socio-economic status) were not included and, as a consequence, the results should be interpreted bearing this limitation in mind
doi:10.1056/NEJMoa2001316 4
Besides, Miao et al
Cerini C, Dou L, Anfosso F, Sabatier F, Moal V, Glorieux G, De Smet R, Vanholder R, Dignat-George F, Sampol J, Berland Y, Brunet P (2004) P-cresol, a uremic retention solute, alters the endothelial barrier function in vitro
Medical supervision: Working with physician understanding research peptide use ideal though many physicians unwilling or unfamiliar