Comment on

• Association of β-blocker use with survival and pulmonary function in patients with chronic obstructive pulmonary and cardiovascular disease: a systematic review and meta-analysis.

  Yang YL, Xiang ZJ, Yang JH, Wang WJ, Xu ZC, Xiang RL. Yang YL, et al. Eur Heart J. 2020 Dec 7;41(46):4415-4422. doi: 10.1093/eurheartj/ehaa793. Eur Heart J. 2020. PMID: 33211823 Free PMC article.
• The shared risk of diabetes between dog and cat owners and their pets: register based cohort study.

  Delicano RA, Hammar U, Egenvall A, Westgarth C, Mubanga M, Byberg L, Fall T, Kennedy B. Delicano RA, et al. BMJ. 2020 Dec 10;371:m4337. doi: 10.1136/bmj.m4337. BMJ. 2020. PMID: 33303475 Free PMC article.
• Prevalence of Personal Attacks and Sexual Harassment of Physicians on Social Media.

  Pendergrast TR, Jain S, Trueger NS, Gottlieb M, Woitowich NC, Arora VM. Pendergrast TR, et al. JAMA Intern Med. 2021 Apr 1;181(4):550-552. doi: 10.1001/jamainternmed.2020.7235. JAMA Intern Med. 2021. PMID: 33393965 Free PMC article.
• Association of Diet and Lifestyle With the Risk of Gastroesophageal Reflux Disease Symptoms in US Women.

  Mehta RS, Nguyen LH, Ma W, Staller K, Song M, Chan AT. Mehta RS, et al. JAMA Intern Med. 2021 Apr 1;181(4):552-554. doi: 10.1001/jamainternmed.2020.7238. JAMA Intern Med. 2021. PMID: 33393976 Free PMC article.
• Population Mortality and Laws Encouraging Influenza Vaccination for Hospital Workers.

  Carrera M, Lawler EC, White C. Carrera M, et al. Ann Intern Med. 2021 Apr;174(4):444-452. doi: 10.7326/M20-0413. Epub 2021 Jan 5. Ann Intern Med. 2021. PMID: 33395343