Supplementary Tables 1 and 2 combined information:

Case36: GT36, Male, 8 years old

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: Not available per supplementary table 1

ParentalGenotype: Parents are not consanguineous, no other genotype information available

CasePresentingHPOs: HP:0000978, HP:0000979, HP:0031364, HP:0000421, HP:0002239

(Bruising, purpura, ecchymosis, epistaxis, gastrointestinal bleeding)

CaseHPOFreeText: Intestinal intrussusception

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: Showed <5% of αIIbβ3 expression measured by flow cytometry

PlateletAggregation: Platelet aggregation showed no response to ADP and collagen but normal response to ristocetin

CasePreviousTesting: All exons from ITGA2B and ITGB3 genes were amplified by PCR using intronic primers. DNA sequencing was determined by Sanger sequencing.

Gene: ITGB3

Variant: NM_000212.2:c.1913+5G>T (c.1913+5G>T)

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA8623377

gnomAD: MAF in the East Asian population 0.0001633 https://gnomad.broadinstitute.org/variant/17-45376901-G-T

Case1: Male, 2 years old, Korean

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: Figure 1 shows haplotype analysis

CasePresentingHPOs: HP:0000978, HP:0000967

(Easy bruising, petechiae)

CaseHPOFreeText: N/A

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: Flow cytometry analyses revealed markedly decreasedCD41/CD61 expression (<1%) in Patient 1 (type I GT).

PlateletAggregation: Platelet aggregation tests were performed to evaluate responses to ADP, collagen, epinephrine, and ristocetin agonists

CasePreviousTesting: Polymerase chain reaction for all exons ofITGA2Band/orITGB3were performed using primers. Sequence analysis was performed with reference to M_000419.3 andNP_000410.2 forITGA2Band NM_000212.2 and NP_000203.2 for ITGB3.

Gene: ITGB3

Variant: NM_000212.2:c.1913+5G>T

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA8623377

gnomAD: MAF in the East Asian population is 0.0001633 http://gnomad.broadinstitute.org/variant/17-45376901-G-T

Case2: Male, 38 years old, Korean

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: Figure 1 shows haplotype analysis

CasePresentingHPOs: HP:0004406, HP:0000225

(Recurrent epistaxis, gingival bleeding)

CaseHPOFreeText: N/A

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: Flow cytometry analyses revealed markedly decreasedCD41/CD61 expression (<1%) in Patient 2 (type I GT).

PlateletAggregation: Platelet aggregation tests were performed to evaluate responses to ADP, collagen, epinephrine, and ristocetin agonists

CasePreviousTesting: Polymerase chain reaction for all exons ofITGA2Band/orITGB3were performed using primers. Sequence analysis was performed with reference to M_000419.3 andNP_000410.2 forITGA2Band NM_000212.2 and NP_000203.2 for ITGB3.

Gene: ITGB3

Variant: NM_000212.2:c.1913+5G>T

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA8623377

gnomAD: MAF in the East Asian population is 0.0001633 http://gnomad.broadinstitute.org/variant/17-45376901-G-T