headtraumarehab.com/pt/re/jhtr/abstract.00001199-199912000-00002.htm;jsessionid=J2fQRbs3sTFrnp7vGBb07P5GcT1bn CLRQb1zfT7Jc159JCkqSrRb!-1690570675!181195629!8091!-1

ncbi.nlm.nih.gov/pubmed/10671699

(both links point to the same trial)

The only trial I could find so far using Mark's search items. Will hunt for more. Doesn´t seem like too many big trials have been done. Found more links but all were the same trial.