Publications by authors named "D S Halperin"

Using the Cascade of Care framework, we explored the demographic and clinical characteristics of students at six stages in an early psychosis detection program at a college counseling center, with a focus on the transition between stages with the highest disengagement. We detailed and compared the demographic and clinical characteristics of those who (1) completed the Prodromal Questionnaire-Brief (PQ-B, N = 1588); (2) met the PQ-B cutoff score (n = 486); (3) were referred for secondary phone screening (n = 404); (4) completed secondary phone screening (n = 198); (5) completed a Coordinated Specialty Care (CSC) eligibility assessment (n = 51); and (6) were enrolled in CSC (n = 21). Education level and gender identity were associated with engagement at multiple stages of the early detection cascade.

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This article examines the complicated terrain of immunization acceptance and access among Indigenous peoples in northern Ontario by drawing on conversations held prior to 2019 that explored knowledge about Haemophilus influenzae type a (Hia) infection specifically and attitudes toward vaccines more broadly. In the decade preceding COVID-19, Hia emerged as a leading cause of morbidity and mortality in Indigenous communities in northern Canada. Before developing new vaccines, it is imperative to hold conversations with the communities most affected and to learn more about Indigenous peoples' perceptions of and knowledge about vaccines, both generally and Hia specifically.

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Delta-like Ligand 3 (DLL3) targeting therapies are promising in small cell lung cancer (SCLC) treatment. However, DLL3 expression in SCLC and other neuroendocrine neoplasms (NEN) is heterogeneous and not well characterized. We describe the landscape of DLL3 at the mRNA and protein levels across SCLC, large cell neuroendocrine carcinoma (LCNEC), and non-small cell lung cancer.

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Article Synopsis
  • - The study reviews current immunotherapy approaches for small bowel neuroendocrine tumors (SBNET) and explores future avenues for better treatment responses
  • - Key treatments like somatostatin analogs and mTOR inhibitors are essential, while new applications of peptide receptor radionuclide therapy (PRRT) show promise, though existing immunotherapies have had limited success
  • - Increased incidence of SBNET highlights the need for more effective therapies, and further research into the immune microenvironment may uncover new targets for improved patient outcomes
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Article Synopsis
  • Gastroenteropancreatic neuroendocrine tumors (GEP-NETs) can vary in aggressiveness, and this study aimed to confirm an automated test for serum chromogranin A (CgA) to help monitor these tumors' progression.
  • The study involved 153 GEP-NET patients and assessed tumor progression using imaging alongside changes in CgA levels, with a specific threshold indicating tumor growth.
  • Results showed the CgA test had high specificity (93.4%) and negative predictive value (84.3%), suggesting it could be a valuable tool alongside standard imaging methods for tracking GEP-NETs.
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