TR helped with conception of the analysis, supervised the statistical analysis.BI helped to draft de manuscript.
MS and JB helped with conception and design of the study and revised the manuscript critically.
UJ: is a co-investigator who is the gynecologist and ethical expert who helped with conception, design, analysis, interpretation and giving final approval of the version to be published.
NT: is a co-investigator who is the gynecologist expert in the field of osteoporosis who helped with conception, design, analysis, interpretation, critical manuscript revision and giving final approval of the version to be published.
SPC helped with the conception, design and co-ordination of the study.
WVC, GB, WL and EH helped with the conception and design of the experiments and critically reviewed the manuscript.
MM helped with the conception and design of the study, data analysis and interpretation, and manuscript revision.
JED made substantial contributions to the manuscript by helping with the conception and design, critical revisions of the manuscript, and obtaining funding.
MCNM and KCL helped with the conception and design of the study and the analysis and interpretation of data, participated in critical revision of the manuscript, and contributed to the final version of the manuscript.
The third author helped with the conception of the work, and with data analysis and interpretation, participated in drafting the article and in the critical revision of the article, and, also, she approved the final version of the article to be submitted.
