Table 1 DNA oligonucleotides used in RT‐PCR sequencing.

Gene/exon	Sense/antisense	References	Sequence	Product size (bp)
Primer A
EWS/exon 7	Sense	Ladanyi and Gerald3	5′‐tcctacagccaagctccaagtc‐3′
WT1/exon 10	Antisense	Ladanyi and Gerald 3	5′‐gccaccgacagctgaagggc‐3′
Primer B
EWS/exon 8	Sense		5′‐catgagtggccctgataacc‐3′
WT1/exon 10	Antisense		5′‐accgggcaaactttttctg‐3′
Primer C
EWS/exon 7	Sense	Ladanyi and Gerald 3	5′‐tcctacagccaagctccaagtc‐3′
WT1/exon 8	Antisense	Gerald et al2	5′‐accttcgttcacagtccttg‐3′
IL‐2	Sense		5′‐aactcaccaggatgctcaca‐3′
	Antisense		5′‐gcacttcctccagaggtttg‐3′	105
IL‐2/15Rβ	Sense		5′‐aatggcacttcccagttcac‐3′
	Antisense		5′‐agcagctcacaggtttggtt‐3′	146
JAK1	Sense		5′‐ggcgtcattctccaaagaag‐3′
	Antisense		5′‐aataggagccaggcatttca‐3′	140
STAT5	Sense		5′‐gtcctgaagacccagaccaa‐3′
	Antisense		5′‐gttgcgggtgttctcatttt‐3′	150
β‐actin	Sense		5′‐aaactggaacggtgaaggtg‐3′
	Antisense		5′‐gtggcttttaggatggcaag‐3′	160

EWS, Ewing's sarcoma gene; JAK1, Janus kinase; STAT5, signal transducers and activators of transcription; WT1, Wilms's tumour gene.