PT - JOURNAL ARTICLE AU - Kevin Cope AU - Alexander Stremitzer TI - Governments are constitutionally permitted to provide ‘vaccine passports’ – we think some may also be constitutionally obligated to do so AID - 10.2967/jnumed.121.262434 DP - 2021 Apr 01 TA - Journal of Nuclear Medicine PG - jnumed.121.262434 4099 - http://jnm.snmjournals.org/content/early/2021/04/16/jnumed.121.262434.short 4100 - http://jnm.snmjournals.org/content/early/2021/04/16/jnumed.121.262434.full