Preterm birth rates among twins during the Danish COVID‐19 lockdown and when restrictions were relaxed. (4th November 2022) - Hedley, Paula L.; Bækvad‐Hansen, Marie; Hedermann, Gitte; Hjalgrim, Henrik; Hougaard, David M.; Melbye, Mads; Breindahl, Morten; Krebs, Lone; Hviid, Anders; Lausten‐Thomsen, Ulrik; Christiansen, Michael