PT - JOURNAL ARTICLE AU - Kevin Cope AU - Alexander Stremitzer TI - Governments Are Constitutionally Permitted to Provide “Vaccine Passports”—Some May Also Be Constitutionally Obligated to Do So AID - 10.2967/jnumed.121.262434 DP - 2021 Jun 01 TA - Journal of Nuclear Medicine PG - 771--772 VI - 62 IP - 6 4099 - http://jnm.snmjournals.org/content/62/6/771.short 4100 - http://jnm.snmjournals.org/content/62/6/771.full SO - J Nucl Med2021 Jun 01; 62