You can search for relevant articles through EDANZ or SCIMAGO; just enter your keywords or abstract and it will lead you through or you can use a customized filtering options from any health sciences database.

Thank Theophilus for your prompt answer. Actually I can not find any publications or report in pubmed, SCIMAGO etc. I cannot believe that such analysis or survey have not been released somewhere. Therefore if somebody have something in mind, i will be more than interested. Thanks in advance

you can search in google scholar and also you can mail to ISPOR consultancy service.

Hubert maybe you can do a bibliometrics analysis on the subject; just a recommendation :)

Maybe you like to look at the SCOPIS.com and use different filter to see the most relevant article.