1.	Pemetrexed, Cisplatin, and Vitamin B12 in Treating Patients With Mesothelioma of the Chest That Cannot Be Removed by Surgery Phase: Phase II Type: Biomarker/Laboratory analysis, Supportive care, Treatment Status: Completed Age: 18 and over Sponsor: Other Protocol IDs: CDR0000564058, COL-ALIMESO, INCA-RECF0441, COL-2006-04, ALIMESO, NCT00541073
2.	A Study for Patients With Non-Squamous Non-Small Cell Lung Cancer Phase: Phase II Type: Treatment Status: Completed Age: 18 and over Sponsor: Pharmaceutical / Industry Protocol IDs: 11652, H3E-CR-S111, NCT00609518
3.	Oral Vitamin B12 Administration for Vitamin B12 Deficiency After Total Gastrectomy Phase: Phase II Type: Supportive care Status: Completed Age: any age Sponsor: Other Protocol IDs: 4-2007-0460, NCT00699478
4.	Study of Pralatrexate to Treat Patients With Relapsed or Refractory B-cell Non-Hodgkin's Lymphoma Phase: Phase II Type: Biomarker/Laboratory analysis, Treatment Status: Closed Age: 18 and over Sponsor: Pharmaceutical / Industry Protocol IDs: PDX-015, NCT00998946
5.	Study of Pralatrexate in Female Patients With Previously-treated Breast Cancer Phase: Phase II Type: Biomarker/Laboratory analysis, Treatment Status: Closed Age: 18 and over Sponsor: Pharmaceutical / Industry Protocol IDs: PDX-014, 2008-006425-14, NCT01118624
6.	Study of Pralatrexate With Vitamin B12 and Folic Acid Supplementation for Previously Treated Recurrent or Metastatic Head and Neck Squamous Cell Cancer (HNSCC) Phase: Phase II Type: Biomarker/Laboratory analysis, Treatment Status: Closed Age: 18 and over Sponsor: Other Protocol IDs: 10-112, NCT01183065
7.	Pemetrexed Plus Cisplatin Versus Gemcitabine Plus Cisplatin for Advanced and Metastatic Non-small Cell Lung Cancer Phase: Phase II Type: Biomarker/Laboratory analysis, Treatment Status: Closed Age: 18 to 75 Sponsor: Other Protocol IDs: HANSOH20090601, NCT01194453