Haggstram, Fabio Maraschin, and Eduardo Walker Zettler. “Complex Sleep Apnea: Worsening of Symptoms With CPAP Use for Obstructive Sleep Apnea <b>[Abstract in English]</I>”. Scientia Medica 20, no. 2 (September 4, 2010): 172-175. Accessed September 22, 2020. https://revistaseletronicas.pucrs.br/ojs/index.php/scientiamedica/article/view/3742.