RT Journal A1 Clary PL T1 LEarning to tie my shoes JF JAMA JO JAMA YR 2009 FD September 9 VO 302 IS 10 SP 1040 OP 1040 DO 10.1001/jama.2009.1225 UL http://dx.doi.org/10.1001/jama.2009.1225 AB