academic article

• Reliability and validity of the University of California, Los Angeles Scleroderma Clinical Trial Consortium Gastrointestinal Tract Instrument..  Arthritis and rheumatism.  61:1257-63. 2009
• Reliability and Validity of the University of California, Los Angeles Scleroderma Clinical Trial Consortium Gastrointestinal Tract Instrument.  Arthritis & Rheumatism-arthritis Care & Research.  2009