INCORRECT

The correct answer is:

FALSE:

The Ellis-van Creveld syndrome most commonly occurs in the Amish of Lancaster, Pa. but is not isolated to this group, The disorder has also been described in English, Dutch, Jewish, Turkish, French-Canadian and a few other persons. No case had been described in the Amish of Ohio, Indiana, or other Amish areas at the time of an extensive search performed by McKusick, et al.