A report from Dr. Frederic Lemieux of George Washington University, presented at an international conference in July, found that "the frequency of this type of incident has accelerated in the past five years."
Michael Vannier, yo e leng porofesa yo o dirang ka didirisiwa tsa marang kwa Yunibesithing ya Chicago Hospital, a re: "Mo dingwageng di sekae fela tse di fetileng, go dirilwe kgatelopele ka lobelo lo lo tseisang sedidi."