Abstract Background The considerable clinical heterogeneity of schizophrenia poses significant challenges for elucidating its neurobiology. The concept of deficit schizophrenia (DS) is a valuable framework for addressing the heterogeneity of schizophrenia. Growing evidence suggests notable differences between deficit (DS) and nondeficit (NDS) schizophrenia. indicating that DS could re... https://foldlyers.shop/product-category/pet-training-aids/