NIH:10.3181/0702-MR-42 NIH:10.3181/0708-MR-226 NIH:10.3181/0709-MR-241 NIH:10.3181/0710-RM-265 NIH:10.3181/0710-RM-269 NIH:10.3181/0712-MR-336 NIH:10.3181/0802-MR-50 NIH:10.3181/0811-RM-325 NIH:10.3181/0904-RM-142