<p><span><span><span><span><span><span><span><span><strong><span><span><span>Clinical trials phases:</span></span></span></strong></span></span><span><span><span><span><span><span> Phase I (pharmacology studies); phase II (therapeutic exploratory investigations); phase III (assessments of the effectiveness of the new intervention); and phase IV (investigations into uncommon adverse effects of the new intervention).</span></span></span></span></span></span></span></span></span></span></span></span></p>
