text: Yo, check it out, we conducted a study
  To test De Wardener's theory, yo, it's quite a journey
  About this plasmatic and natriuretic factor
  In essential hypertension, we're aiming for the answer
  
  We took an indirect approach, let me break it down
  Modified plasma volume and sodium pool all around
  In chronic renal failure and primary hypertension
  While measuring ionic flux in human erythrocytes, attention!
  
  We found some evidence, yo, it's pretty tight
  Confirming the presence of that factor, shining bright
  In hydrosaline overloaded uraemic patients, that's the deal
  And in "salt-sensitive" essential hypertensive subjects, it's real!