- The initial, baseline QoL testing of IPTLD patients who choose to be in the study will include some questions designed to elicit the reasons the patient decided on IPTLD and nutrition therapy. Documenting these choices can serve two purposes; correlations between reasons, and the attitudes they reveal about factors known to impact QoL, such a positive sense of controlling one's health choices, can be drawn. Further, once these factors are accounted for, some inferences about the extent to which IPTLD and nutrition therapy are responsible for impacts on QoL can be derived.