2024 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2023 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2022 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2021 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2020 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2018 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2017 42 USC 280b–4 – Study conducted by the Centers for Disease Control and Prevention

2015 42 USC 280b–4 – Study conducted by the Centers for Disease Control and Prevention

2014 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2013 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2012 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention

2010 42 USC 280b-4 – Study conducted by the Centers for Disease Control and Prevention