HB was responsible for the concept and the design of the study,
as well as for the data collection and also contributed to the
manuscript preparation; KG participated in the study design,
manuscript preparation and data collection; NVF was responsible
for the interpretation of the results and the preparation of
the manuscript; PG was responsible for the interpretation of the
results and the statistical analysis; EP was responsible for manuscript
preparation and data collection; ES was responsible for
data collection and result interpretation; IE participated in the
study design, result interpretation and manuscript preparation.
All authors have given their approval for the submission of the
final version of this manuscript.