"This article is a preprint and has not been certified by peer review"
also the first comment there (http://disq.us/p/25lpyed)
which I take the liberty to reproduce here:
Greetings,
With all due respect, the allegations in the article, namely, that supercentenarians are concentrated into regions with no birth certificates and short lifespans is false. By the study of the Gerontology Research Group, International Database on Longevity and Max Planck Institute for Demographic Research among others, we know that supercentenarians are extremely rare, yet an existent and validated population. The Gerontology Research Group takes the global view on the subject, using stable and defined validation criteria outlined by Dr. Poulain of Belgium in the Supercentenarians monograph (2010). I invite all of you who would like to learn more about the GRG data and its characteristics.
also the first comment there (http://disq.us/p/25lpyed) which I take the liberty to reproduce here:
Greetings,
With all due respect, the allegations in the article, namely, that supercentenarians are concentrated into regions with no birth certificates and short lifespans is false. By the study of the Gerontology Research Group, International Database on Longevity and Max Planck Institute for Demographic Research among others, we know that supercentenarians are extremely rare, yet an existent and validated population. The Gerontology Research Group takes the global view on the subject, using stable and defined validation criteria outlined by Dr. Poulain of Belgium in the Supercentenarians monograph (2010). I invite all of you who would like to learn more about the GRG data and its characteristics.
www.grg.org
Sincerely,
Waclaw Jan Kroczek
GRG Administrator for Case Validation Reports