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But assuming that this error is somehow the same for the whole sample , our finding that the group of society that engages most in khat chewing ( males above the age of 12 ) most often suffers severe impairment due to mental disorders shows evidence that khat is related to mental health problems . As described above , in the whole-eye culture system , the corneal epithelial migration is modulated by the presence of an inflamed stroma , which would be expected to accelerate cell migration over extended periods of healing . We consider the randomized , breastfed control group ( B ) to be a gold standard against which the others are compared . Despite this correlation , the disruption of EpsH in Methylobacillus sp. 12S proved not to affect production of methanolan , an exopolysaccharide whose synthesis depends instead on several neighboring genes [ 33 ] . To determine the cause of the loss of the endocochlear potential in Slc26a4 - / - mice , we first determined whether intermediate cells are present in stria vascularis , since a loss of intermediate cells is known to lead to a loss of the endocochlear potential [ 27,28 ] . Tissue height of stria vascularis was normal ( Fig. 5 ) , consistent with the similar numbers of 18S rRNA molecules in isolated preparations ( see above ) . Despite substantial differences in design and methodology between CATIE and US-SCAP ( e.g ., CATIE is a randomized , double blind trial and US-SCAP is non-randomized and non-interventional ) , both studies found atypical antipsychotics to be a heterogeneous group on time to all-cause medication discontinuation . First , the non-randomized , naturalistic design of this study introduced potential selection bias , which cannot be completely eliminated despite our use of statistical adjustments for a set of socio-demographic and treatment characteristics . However , hESC must be routinely analyzed at the genomic level to guard against deleterious changes during extensive propagation , expansion , and manipulation in vitro . The major psychoactive cannabinoid compound of marijuana , Δ 9 tetrahydrocannabinol ( THC ) , has been shown to modulate and primarily suppress immune responses against various pathogens [ for review see [ 17,18 ] ] . Local interviewers found that rates of severe disability due to mental disorders were 8.4 % among males ( above the age of 12 ) and differed according to war experiences ( no war experience : 3.2 % ; civilian war survivors : 8.0 % ; ex-combatants : 15.9 % ) . The corona radiation was sampled in regions with only nerve fibers and devoid of neuronal soma , thus nuclei are represented in Figure 2 in gray since they were not sampled . The association of PEP-CTERM system components with exopolysaccharide biosynthesis and transport genes must be considered against the fact that exopolysaccharide is expressed in a much wider group of organisms than PEP-CTERM . Despite the ongoing scientific debate about amphetamine-induced psychosis it remains unclear whether the use of amphetamine-like substances including khat may actually cause a psychotic disorder in an otherwise healthy individual , or trigger the onset of schizophrenia in an individual with high vulnerability to the disease [ 24,25 ] . All the regions listed under class 2 have this pattern , and for two regions , inferior colliculus and hippocampus , the B group DHA is significantly greater than a supplemented group ( T + ) . The proportion of positive screening cases was substantially higher among males above the age of 12 who had active war experience ( ex-combatants ) than in male civilian war survivors of the same age ( p < 0.001 , Table 1 ) . However , the antiviral effect of THC is not cell specific , since MHV 68 and HVS replication was also strongly inhibited by THC in NIH3T12 or owl monkey kidney monolayer cell cultures . Despite these generalizations , the characteristics of mammary tumors arising in transgenic mice differ in a fashion characteristic of the initiating oncogene .