1. Higher-level gait disorders: an open frontier;Nutt;Mov Disord,2013
2. Zitser J, Jankovic J, Giladi N. Disorders of gait. In: Jankovic J, Tolosa E, editors. Parkinson's disease and movement disorders. 6th edition. Philadelphia: Lippincott Williams & Wilkins; 2015.
3. Clinical practice: preventing falls in elderly persons;Tinetti;N Engl J Med,2003
4. Frailty in elderly people;Clegg;Lancet,2013
5. Common curbsides and conundrums in geriatric medicine;Tung;Mayo Clin Proc,2013