Series	No. of participants	No. improved	Notes (autologous transplant unless noted)
Vermeulen 2002	1	1	Relapse after 5 years
Barreira 2007	1	1	Improvement lasted for 1 month
Oyama 2007	1	1	No disease exacerbation 22 months after transplant. By 6 months after transplant the person's Rankin function score had improved from 4 to 1 and corticosteroids, IVIg, and plasma exchange were withdrawn
Mahdi‐Rogers 2009	3	2	1 of the 2 who benefited relapsed after 18 months
Remenyi 2007	1	1	Allogeneic transplant. No relapse after 6.5 years
Allen 2013	32 at 1 year	24 at 1 year	Follow up: 6 months (n = 38), 1 year (n = 32), 2 years (n = 20), 3 years (n = 14), 4 years (n = 9), and 5 years (n = 5). Drug‐free remission was observed in 68% of 28 at 6 months, 75% of 32 at 1 year, 75% of 20 at 2 years, 78% of 14 at 3 years, 55% of 9 at 4 years, and 40% of 5 at 5 years. and Short Form 36 Health Survey questionnaire significantly improved at last follow‐up (P < 0.001)
Press 2014	11	8	The median follow‐up period was 28 months. 8 of 11 of those treated went into drug‐free remission
Total	50	38