1	exp Leukemia, Lymphocytic, Chronic, B‐Cell/
2	((leuk?em$ or leu?em$ or lymph$) adj (lymphocyt$ or lymphoblast$ or linfoid$ or b‐cell$)).tw,kf,ot.
3	(chronic$ or cronic$ or chroniq$ or well‐differential$).tw,kf,ot.
4	2 and 3
5	(lymphom$ and (small cell$ or small‐cell$)).tw,kf,ot.
6	(lymphom$ adj2 lymphocyt$).tw,kf,ot.
7	lymphoplasma?ytoid.tw,kf,ot.
8	cll.tw.
9	sll.tw.
10	or/5‐9
11	1 or 4 or 10
12	exp Antimetabolites/
13	(purin$ adj2 analog$).tw,kf,ot.
14	Pentostatin/
15	pentostatin$.tw,kf,ot.
16	lederl$.tw,kf,ot.
17	prasfarm$.tw,kf,ot.
18	supergen$.tw,kf,ot.
19	wyet$.tw,kf,ot.
20	nipet$.tw,kf,ot.
21	nipent$.tw,kf,ot.
22	deoxycoformycin$.tw,kf,nm,ot.
23	(ci‐825 or ci825).tw,kf,nm,ot.
24	(nsc‐218321 or nsc218321).tw,kf,nm,ot.
25	(pd‐81565 or pd81565).tw,kf,nm,ot.
26	(co‐vidarabin$ or covidarabin$).tw,kf,ot.
27	dcf$.tw,kf,ot.
28	or/12‐27
29	Cladribine/
30	cladribin$.tw,kf,ot.
31	litak$.tw,kf,ot.
32	movectro$.tw,kf,ot.
33	leustat$.tw,kf,ot.
34	chlorodeoxyadenosin$.tw,kf,nm,ot.
35	deoxyadenosin$.tw,kf,nm,ot.
36	chloroadenosin$.tw,kf,nm,ot.
37	(2‐cda$ or 2cda$).tw,kf,nm,ot.
38	(rwj‐26251$ or rwj26251$).tw,kf,nm,ot.
39	or/29‐38
40	Fludarabin$.tw,kf,ot.
41	fludara$.tw,kf,ot.
42	fluoro‐ara$.tw,kf,nm,ot.
43	amp$.tw,kf,nm,ot.
44	famp$.tw,kf,nm,ot.
45	or/40‐44
46	28 or 39 or 45
47	11 and 46
48	randomized controlled trial.pt.
49	controlled clinical trial.pt.
50	randomized.ab.
51	placebo.ab.
52	drug therapy.fs.
53	randomly.ab.
54	trial.ab.
55	groups.ab.
56	or/48‐55
57	humans.sh.
58	56 and 57
59	47 and 58