    <p>numeric vector</p>
    
    <h2 class="hasAnchor" id="references"><a class="anchor" href="#references"></a>References</h2>

    <p>'Davy KP, Seals DR. Total blood volume in healthy young and older
  men. J Appl Physiol 1994; 76: 2059-62'</p>
<p>'Parker-Jones P, Davy KP, DeSouza CA et al. Absence of age-related decline
  in total blood volume in physically active females. Am J Physiol 1997; 272:
  H2534-40'</p>
    

    <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Exampl