Sentence:  Data, in part previously reported by this laboratory (2, 9), on the effects of mannitol loads in <WSD>supine</WSD> subjects, and of saline infusions in both <WSD>supine</WSD> and standing subjects, have also been used in the construction of Table III and Figures 1 and 2. 
Meaning of the word marked with <WSD> tags:  Lying on its back.