1<p>State laws with (yes) or without (no) an abstinence provision as of 2007 <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0024658#pone.0024658-Zinth1" target="_blank">[16]</a>.</p>2<p>Level of Abstinence provision in state law as of 2007 <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0024658#pone.0024658-Callahan1" target="_blank">[17]</a>.</p>3<p>Level of Abstinence provision in state law or other policy as of 2005 <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0024658#pone.0024658-SIECUS2" target="_blank">[19]</a>; differences to laws<sup>2</sup> are noted in <i>italics</i>.</p
