KM contributed to the conception or design of the work.
Substantial contributions to the conception or design of the work; or the acquisition, JIB, MI, ESM, BS.
CC, MF, DM, MP, IW, RTS, PM, JC and RG contributed to the conception or design of the analysis.
CC, MF, DM, MP, IW, RTS, PM, JC and RG contributed to the conception or design of the data collection.
ES, PWK, KS, AJW, AP, BAl-N, and MOK contributed to substantial contributions to the conception or design of the work or the acquisition, analysis, or interpretation of data for the work.
A 1994 study found that 21% of authors of basic science biology papers and 30% of authors of clinical studies had no involvement in conception or design of the project, design of the study, analysis and interpretation of data, and writing or revisions.
All authors (apart from AL) participated in the conception, design or conduct of the study.
They did not have any influence over the study conception, design or interpretation, or the decision to publish the data.
EJH has received grant funding from Pfizer Inc, which had no influence in the conception, design or analysis of this work, and no role in manuscript preparation or publication.
The design, implications, and conclusions of the manuscript are solely the responsibility of the authors, and the funding source had no role in the conception, design, or content of the manuscript.
However, most of the articles referred to old conceptions [ 21– 23] or designs which did not insure a good primary fixation [ 24].
