@book{book, title  = {{Methods for Health Services Research: a state of the art guide.}},

 publisher = {{BMJ Books}},

 url = {{}},

 year = {{1999}},

 month = {{1}},

 author = {{Brazier JE and Black N and Fitzpatrick R and Reeves B}},

 note = {{Accessed on 2024/12/26}}}