Table 2.

Used antibody, clone, company, dilution, and scoring

Antibody	Clone	Company	Dilution (incubation time)	Scoring
SSTR1	sstr1 (monoclonal)	AbD Serotec, Oxford, United Kingdom	1:500 (30 min)	0, 0; 1, <10%, weak cytoplasmic positivity; 2, ≥10% weak cytoplasmic positivity; 3, moderate cytoplasmic positivity; 4, strong cytoplasmic positivity ^a
SSTR2	UMB-1 (monoclonal)	Abcam	1:300 (30 min)	0, 0; 1, <10%, not totally circumferential membrane positivity; 2, ≥10% not totally circumferential membrane positivity; 3, strong circumferential membrane positivity in 10%-94% of tumor cells; 4, strong circumferential positivity in ≥95% of tumor cells ^b
SSTR3	UMB-5 (monoclonal)	Abcam	1:7000 (60 min)	Intensity of cytoplasmic staining 0, 0; 1, weak; 2, moderate; 3, strong If <10% of tumor cells positive, intensity downgraded by 1 grade ^c
SSTR4	sstr4 (monoclonal)	AbD Serotec, Oxford, United Kingdom	1:500 (30 min)	Same as SSTR1
SSTR5	sstr5 (monoclonal)	Bio-Rad, Oxford, United Kingdom	1:1000 (30 min)	0, 0; 1, <10%,weak cytoplasmic positivity; 2, ≥10% weak cytoplasmic positivity; 3, moderate cytoplasmic or some membrane positivity; 4, strong cytoplasmic positivity or membrane positivity ^a
Ki-67	MIB1/M7240 (monoclonal)	Agilent	1:100 (60 min)	Percentage of positive cells
Chromogranin A	Rabbit polyclonal	Agilent	1:2000 (30 min)	Positive/negative
SDHB	21A11 (mouse monoclonal)	Abcam	1:1000	Positive/negative
SDHA	5A11 (mouse monoclonal)	Abcam	1:1000	Positive/negative

For statistics, the scores for SSTR1, SSTR4, andSSTR5 were grouped into 3: negatives (score 0 and 1), intermediate positive (scores 2 and 3), and strongly positive (score 4).

For statistics, the SSTR2 scores were grouped into 3: negative (scores 0 and 1), intermediate positive (score 2), and strongly positive (scores 3 and 4).

For statistics, the SSTR3 scores were grouped into 3: negative (score 0), intermediate positive (score 1), and strongly positive (scores 2 and 3).