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Keratinocytes are the main targets of infiltrating T cells in the pathogenesis of lichen planus. However, the mechanisms of dense inflammatory infiltrates beneath the epidermis remain unknown. The aim of the present study was to clarify the roles of programmed cell death 1 (PD-1) and its ligand (PD-L1) in the pathogenesis of lichen planus. Immunohistochemistry of PD-1 and PD-L1 in 12 cases each of lichen planus and dermal-type erythema multiforme was performed. The expression of PD-1 and PD-L1 on infiltrating inflammatory cells, predomi

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Prior research suggests that the strength of association between Alzheimer's disease (AD) pathology and lower cognitive performance is influenced by modifiable psychosocial factors, such as social network size. However, little is known about distinct social relationship types. The current cross-sectional study used data from the Washington Heights-Inwood Columbia Aging Project to examine whether social network characteristics (i.e., total size, spouse/partner, number of children, other relatives, friends) moderate associations betwe