Young-Wolff, Kelly C and Sarovar, Varada and Tucker, Lue-Yen and Ansley, Deborah and Goler, Nancy and Conway, Amy and Ettenger, Allison and Foti, Tara R and Brown, Qiana L and Kurtzman, Ellen T and Adams, Sara R and Alexeeff, Stacey E (2022) Trends in cannabis polysubstance use during early pregnancy among patients in a large health care system in Northern California. JAMA Network Open , 5 , (6) .