In the article by Stergiou et al.  there are errors in Fig. 2, page 464 (Forms for supervisor and observers of validation studies to fill individual subjects’ data while performing a study). Specifically, in each of the Observers’ forms (OBSERVER A and B on the right side) the order of boxes R1-R1-R2-R3 should be replaced by the following: R1-R2-R3-R4. The same errors were present in page of the supplementary file (http://links.lww.com/HJH/B71). The online article and the supplementary file have been corrected.
1. Stergiou GS, Palatini P, Asmar R, Ioannidis JP, Kollias A, Lacy P, et al. Recommendations and Practical Guidance for performing and reporting validation studies according to the Universal Standard for the validation of blood pressure measuring devices by the Association for the Advancement of Medical Instrumentation/European Society of Hypertension/International Organization for Standardization (AAMI/ESH/ISO). J Hypertens