Their main functions are altering the tongue's position allowing for protrusion, retraction, and side-to-side movement. Subsequent pilus retraction drags the cell forward. In mild disease, patients present with eyelid retraction. "Note&colon;" An equivalent definition of deformation retraction is the following. The publication later issued a retraction and an apology to Rollins. Whitman denied Rollins's claim and demanded an apology and a retraction. A Danish survey found that the mean age of first foreskin retraction is 10.4 years. A hydraulic problem precluded retraction of the landing gear, but subsequent flights went more smoothly. Clicks subject to this constraint involve a sharp retraction of the tongue during release. He also demanded the company print a retraction and apology in a future paper. Correa has stated he was only seeking a retraction for slanderous statements. The three models explaining synaptic pruning are axon degeneration, axon retraction, and axon shedding. Other common complications of colostomy are high output, skin irritation, prolapse, retraction, and ischemia. The owner sent a letter to Jones in February 2017 demanding a retraction or apology. Nevertheless, ABC made the retraction and apology, which made Wallace furious.