Sentence examples for been only two studies from inspiring English sources

There have been only two studies, thus far, comparing the protective effects of EPO when administered at different time points.

To date, there have been only two studies relating concentrations of atrazine in drinking water and adverse pregnancy outcomes.

There have been only two studies of IPC in LRLT published in the literature thus far [ 33, 34].

There have been only two studies examining the effect of lower dialysate [Na+] on LV structure and function [ 90, 91].

To date, there have been only two studies that have attempted to reconstruct phylogenetic relationships among anopluran families [ 21, 22].

To date, there have been only two studies using MVPA in SAD but concentrating on task-based fMRI and regional grey matter volume [ 11], or functional connectivity [ 7].

There have been only three studies of paternal depression in Japan [ 13– 15].

Prior to our study, there have been only three studies on paricalcitol in CKD stage 3 and 4 patients [ 15– 17].

There have been only four studies on ErbB4 expression patterns and prognostic significance in CRC patients [ 36– 36].

There were only two studies for Effexor, just one of which suggested it might help.

Dr. Rosen said there were only two studies on phytonutrients -- naturally occurring antioxidants -- and only one showed higher levels in organic food.