Table 2.

Demographic characteristics and mean follow-up of the patients.

Authors	Number of patients	Mean age (years)	Sex	Mean follow-up
Ozgur et al. 24	20	67	11F	24 months
			9M
Lanzone et al. 25	16	75	10M	24 months
			6F
Lorenzetti et al.26	57	73	17M	46 months
			40F
Garofalo et al.27	26	68.5	8M	32 months
			18F
Jones et al. 28	44	69.1	20M	40.6 months
			24F
Werner et al. 5	21	71	3M,18F	4.9 years
Ernstbrun-ner et al.29	41	73.5	13M, 28F	2.8 years
Lopiz et al. 30	20	75.3	2M, 18F	38 months
Boileau et al. 13	54	73	13M, 41F	36 months
Tashjian et al. 31	14	75	4M, 10F	2.6 years
Gupta et al. 32	54	70.4	8M, 46F	29.6 months
Mahylis et al. 33	30	67.4	16M, 14F	2.9 years
Wagner et al. 6	142 (40 study group +102 control group)	69	50M, 92F	3.1 years

(M: males, F: females, Not rep.: not reported).