Table 3.

Frequency of annual recruitment in a few series in the literature

Author	Country	Department	Duration of the study	Number of patients	Frequency (case/year)
Malabu [9]	Saudi Arabia	Internal medicine	2000–2006	46	8
Paruk [10]	South Africa	Endocrine diseases	2003–2009	28	5
Bhansali [11]	India	General surgery	1993–2005	52	4
Bahrami [12]	Iran	Endocrine diseases	1985–2002	62	3
Our study	Algeria	ENT	2002–2013	62	5