Serum amino acid concentrations and clinical outcomes in smokers: SPIROMICS metabolomics study.

Labaki WW, Gu T, Murray S, Curtis JL, Yeomans L, Bowler RP, Barr RG, Comellas AP, Hansel NN, Cooper CB, Barjaktarevic I, Kanner RE, Paine R, McDonald MN, Krishnan JA, Peters SP, Woodruff PG, O'Neal WK, Diao W, He B, Martinez FJ, Standiford TJ, Stringer KA, Han MK