Placebo

Hartmann‐Boyce  J, McRobbie  H, Bullen  C, Begh  R, Stead  LF, Hajek  P. Electronic cigarettes for smoking cessation. Cochrane Database of Systematic Reviews 2016, Issue 9. Art. No.: CD010216. DOI:

Miovský M et al. Attention Deficit Hyperactivity Disorder among clients diagnosed with a substance use disorder in the therapeutic communities: prevalence and psychiatric comorbidity. Eur Addict Res 2020.

Ortel TL et al. American Society of Hematology 2020 guidelines for management of venous thromboembolism: treatment of deep vein thrombosis and pulmonary embolism. Blood Adv 2020; 4(19): 4693-4738.

Chu JJ et al. Mifepristone and misoprostol versus misoprostol alone for the management of missed miscarriage (MifeMiso): a randomised, double-blind, placebo-controlled trial. Lancet 2020 Sep 12;396(10253):770-778.

Vodicka TA et al. Reducing antibiotic prescribing for children with respiratory tract infections in primary care: a systematic review. Br J Gen Pract 2013;63(612):e445-54.

Dominici F, et al. Air pollution, SARS-CoV-2 transmission, and COVID-19 outcomes: a state-of-the-science review of a rapidly evolving research area. medRxiv 2020. doi: https://doi.org/10.1101/2020.08.16.20175901

Marion M Mafham et al. COVID-19 pandemic and admission rates for and management of acute coronary syndromes in England. Lancet 2020;S0140-6736(20)31356-8.

Orkaby AR. Association of statin use with all-cause and cardiovascular mortality in US veterans 75 years and older. JAMA 2020;324(1):68-78

Lethaby AE et al. Progesterone/progestogen releasing intrauterine systems versus either placebo or any other medication for heavy menstrual bleeding. Cochrane Database Syst Rev. 2000;(2):CD002126. doi: 10.1002/14651858.CD002126.

Levis B. Accuracy of the PHQ-2 alone and in combination with the PHQ-9 for screening to detect major depression: systematic review and meta-analysis. JAMA 2020;323(22):2290-2300.