Comment on Mente, O'Donnell, Rangarajan, et al. "Associations of urinary   sodium excretion with cardiovascular events in individuals with an without   hypertension: a pooled analysis of data from four studies"
  Mente, O'Donnell, Rangarajan, et al. ignore a possible source of bias that may invalidate their finding of an anticorrelation between sodium intake and cardiovascular events 
J. I. Katz
physics.bio-ph q-bio.QM