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Each column corresponds to a patient labeled according to survival ( = recurrence ; defined as distant metastases or death within 5 years of diagnosis ) , Elston grade 3 , and lymph node status , where gray symbols indicate missing values . Next , the propensity scores were divided into bins based on quintiles of the propensity score distribution . " Symptom Worsening was based on " Psychiatric Adverse Events " and a priori protocol defined " Clinical Relapse " ( Study 2 only ) . The gene-expression profile of pluripotent hESCs has not been completely defined , but much work has been carried out toward defining common sets in undifferentiated and differentiating hESCs [ 12-14 ] . On average , cases with psychotic symptoms had started to use khat earlier in life than matched controls and had been using khat 8.6 years before positive symptoms emerged . For this purpose we used the same sections as UNICEF in their assessment of vaccination coverage for children in October 2002 , which were defined in a joint approach by UNICEF and the municipality of Hargeisa . Cell suspensions were loaded in wells of a vertical agarose gel as described [ 31,32 ] . Combined MPE / SHG imaging of tumor explants cultured within 3D collagen gels for eight hours demonstrates that tumor cells reorganize a previously random matrix to facilitate invasion . However , when infected cells were cultured in the presence of 1.25 μ g / ml or higher concentrations of THC , they remained indistinguishable from uninfected control cells and remained adhered to the plate . Kaplan-Meier curves comparing recurrence-free survival ( defined as no death and no distant metastasis ) for patients with HRT-like expression profiles ( solid line ) and patients with non-HRT-like expression lines ( dashed lines ) . The data presented here shows the overexpression of collagen genes in a sample of hESC cultured in feeder-free conditions , which suggests that the microarray method can detect differentiating subpopulations , but there is no way to retrospectively determine the level of differentiation .