Change in obstetric attendance and activities during the COVID-19 pandemic

Khalil A., von Dadelszen P., Kalafat E., Sebghati M., Ladhani S., Ugwumadu A., ...More

The Lancet Infectious Diseases, vol.21, no.5, 2021 (SCI-Expanded) identifier identifier identifier identifier

  • Publication Type: Article / Letter
  • Volume: 21 Issue: 5
  • Publication Date: 2021
  • Doi Number: 10.1016/s1473-3099(20)30779-9
  • Journal Name: The Lancet Infectious Diseases
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, CAB Abstracts, CINAHL, EMBASE, Food Science & Technology Abstracts, MEDLINE, Veterinary Science Database
  • Middle East Technical University Affiliated: No

Abstract

Proof systems for the Relativized Propositional Calculus are defined and compared.