Effectiveness of a tooth-brushing programme using the picture exchange communication system (PECS) on gingival health of children with autism spectrum disorders

2019 ◽  
Vol 21 (2) ◽  
pp. 277-283 ◽  
Author(s):  
O. B. Al-Batayneh ◽  
T. S. Nazer ◽  
Y. S. Khader ◽  
A. I. Owais
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