Measurement of intracellular triglyceride stores by 1-H spectroscopy: validation in liver and skeletal muscle in vivo. - Szczepaniak,L.S.; Babcock,E.E.; Schick,F.; Dobbins,R.L.; Garg,A.; Burns,D.K.; McGarry,J.D.; Stein,D.T. (Am J Physiol, 1999)