Author

Zabet et al.

Tanaka et al.

Ferrón-Celma et al.

Fowler et al.

Kahn et al.

Marik et al.

Type of study

RCT

RCT

RCT

RCT

Retrospective

Retrospective

Year

2016

2000

2009

2014

2011

2017

Country

IRAN

JAPAN

SPAIN

USA

USA

USA

Number of patients

28

37

20

24

40

94

Mean age ± SD (years)

64 ± 16

40 ± 20

68 ± 4.5

NA

42 ± 16

54 ± 14

Males/females (no.)

21/7

25/12

11/9

13/11

33/0

50/44

Study quality

4 stars

3 stars

4 stars

5 stars

7 stars

7 stars