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  • Oral calorie supplements for cystic fibrosis
    Cochrane Systematic Reviews, 4-May-2017
  • Oral contraceptives for pain associated with endometriosis
    Cochrane Systematic Reviews, 22-May-2018
  • Oral herbal therapies for treating osteoarthritis
    Cochrane Systematic Reviews, 22-May-2014
  • Oral morphine for cancer pain
    Cochrane Systematic Reviews, 22-Apr-2016
  • Oral protein calorie supplementation for children with chronic disease
    Cochrane Systematic Reviews, 27-May-2015
  • Oral rehydration salt solution for treating cholera: ≤ 270 mOsm/L solutions vs ≥ 310 mOsm/L solutions
    Cochrane Systematic Reviews, 7-Dec-2011
  • Oral versus intravenous antibiotic treatment for febrile neutropenia in cancer patients
    Cochrane Systematic Reviews, 21-Sep-2016
  • Oral zinc for arterial and venous leg ulcers
    Cochrane Systematic Reviews, 9-Sep-2014
  • Organised inpatient (stroke unit) care for stroke: network meta‐analysis
    Cochrane Systematic Reviews, 23-Apr-2020
  • Orientation and mobility training for adults with low vision
    Cochrane Systematic Reviews, 12-May-2010
  • Orthodontic and orthopaedic treatment for anterior open bite in children
    Cochrane Systematic Reviews, 23-Sep-2014
  • Orthodontic treatment for deep bite and retroclined upper front teeth in children
    Cochrane Systematic Reviews, 1-Feb-2018
  • Orthodontic treatment for posterior crossbites
    Cochrane Systematic Reviews, 24-Dec-2021
  • Orthodontic treatment for prominent upper front teeth (Class II malocclusion) in children and adolescents
    Cochrane Systematic Reviews, 13-Mar-2018
  • Osteotomy, compression and other modifications of surgical techniques for internal fixation of extracapsular hip fractures
    Cochrane Systematic Reviews, 15-Apr-2009
  • Ovulation suppression for endometriosis for women with subfertility
    Cochrane Systematic Reviews, 18-Jul-2007
  • Oxygen therapy during exercise training in chronic obstructive pulmonary disease
    Cochrane Systematic Reviews, 11-Jun-2009
  • Ozone therapy for the treatment of dental caries
    Cochrane Systematic Reviews, 7-Feb-2019
  • Pain management for sickle cell disease in children and adults
    Cochrane Systematic Reviews, 10-Jun-2019
  • Pain relief for neonatal circumcision
    Cochrane Systematic Reviews, 19-Jul-2004
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