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1- Not all concurrent diseases and medications which may induce seizure were identified.
2- Marketing strategies by the drug companies and their competitors in different countries are not the same. This may give some effects to the results of this type of study.
3- Differences in sample baseline: Some of the samples were specialist (40.3%) with difference specialties, and samples were from different geographical areas (Area 1 consists predominantly of old established suburbs and area 2 of relatively new suburbs and country areas). These might influence the study results.
4- No explanation given why some of the faculties and physicians did not give the response.
This may give some effects to the results- This may affect the results...
No explanation given why- No explanation was given as to why some of tha faculties and physicians did not respond