http://www.newyorker.com/reporting/2013/03/04/130304fa_fact_colapinto
http://en.wikipedia.org/wiki/Vocal_fold_nodule
http://www.asha.org/public/speech/disorders/NodulesPolyps/
http://www.voicedoctorla.com/voice-disorders/vocal-nodules-nodes/
http://www.cbsnews.com/news/meet-adeles-vocal-cord-surgeon-dr-steven-zeitels/