ScienceSource
['Assessment of the extent of unpublished studies in prognostic factor research: a systematic review of p53 immunohistochemistry in bladder cancer as an example', 'ScienceSource', 'scientific article', '2016-08-16', 'Assessment of the extent of unpublished studies in prognostic factor research: a systematic review of p53 immunohistochemistry in bladder cancer as an example', 'BMJ Open']