Table I.

Animal numbers and recovered grafts

Weeks	1	2	3	4
(a) Short-term xenografting
n (hosts)	10	16	10	11
n (grafts)	71	157	132	121
Weeks	2	4	6	8	10	12
(b) Long-term xenografting
n (hosts)	8	10	9	7	8	9
n (grafts)	46	122	60	59	78	76