Day 1 Bevacizumab 5mg/kg IV 90 minutes prior to irinotecan/LV Irinotecan 180 mg/m2 IV 90 minutes Leucovorin 400 mg/m2 IV 2 hours - given with irinotecan without mixing.

I m m e d i a t e l y f o l l o w e d b y :

5-FU 400 mg/m2 IV bolus 5-FU 2400 mg/m2 IV Continuous infusion over 46 hours Every 2 weeks

Amendment 2 Bevacizumab 5mg/kg IV 90 minutes prior to irinotecan/LV Irinotecan 180 mg/m2 IV 90 minutes Leucovorin 400 mg/m2 IV 2 hours - given with irinotecan without mixing.

I m m e d i a t e l y f o l l o w e d b y :

5-FU 400 mg/m2 IV bolus 5-FU 2400 mg/m2 IV Continuous infusion over 46 hours Celecoxib/placebo 400 mg BID [two times a day] oral Every 2 weeks

Day 1 Bevacizumab 7.5mg/kg IV *over 90 minutes - given prior to irinotecan, 5-FU, and leucovorin Irinotecan 125 mg/m2 IV over 90 minutes Leucovorin 20 mg/m2 IV bolus 5-FU 500 mg/m2 IV bolus Day 8 Irinotecan 125 mg/m2 IV over 90 minutes Leucovorin 20 mg/m2 IV bolus 5-FU 500 mg/m2 IV bolus Every 3 weeks Amendment 2 Day 1 Bevacizumab 7.5mg/kg IV over 90 minutes - given prior to irinotecan, 5-FU, and leucovorin Irinotecan 125 mg/m2 IV over 90 minutes Leucovorin 20 mg/m2 IV bolus 5-FU 500 mg/m2 IV bolus Celecoxib/placebo 400 mg BID [two times a day] oral Day 8 Irinotecan 125 mg/m2 IV over 90 minutes Leucovorin 20 mg/m2 IV bolus 5-FU 500 mg/m2 IV bolus Celecoxib/placebo -- 400 mg po BID [two times a day] continues daily without interruption Every 3 weeks

Day 1: Irinotecan (180 mg/m2) IV over 90 minutes, LV (racemic mixture 400 mg/m2) over 2 hours during irinotecan infusion but without mixing, immediately followed by 5-FU IV bolus (400 mg/m2) and 5-FU continuous infusion (2400 mg/m2) over 46 hours. FOLFIRI regimen is repeated every 2 weeks. Celecoxib/placebo treatment will commence on the same day at a dose of 400 mg po BID [two times a day](800 mg/day) and will continue daily without interruption (no rest period for celecoxib/placebo treatment).

Day 1: Irinotecan (250 mg/m2 IV) over 90 minutes; Day 1-14: capecitabine 1000 mg/m2 PO BID [two times a day] (28 single doses). All chemotherapy cycles repeated every 3 weeks. Celecoxib/placebo treatment will commence on the same day as chemotherapy treatment (i.e. Day 1 of treatment on study). Celecoxib/placebo will be taken at a dose of 400 mg po BID (800 mg/day) and will continue daily without interruption (no rest period for celecoxib/placebo treatment).

Survival time defined as time from date of randomization to date of death. In the absence of confirmation of death, survival time was censored to last date the subject known to be alive.

Number of patients alive or dead at 1 year. In the absence of confirmation of death, survival time was censored to last date the subject known to be alive.

Time to disease progression is defined as the number of months from date of randomization to the date of first documentation of disease progression (PD).

A subject will be considered achieving an overall response if the subject has a sustained CR or PR for at least 4 weeks, confirmed by tumor assessments. (Complete Response (CR): Disappearance of all target lesions. Partial Response (PR): ≥ 30% decrease in the sum of the LD of target lesions, taking as reference the Pre-treatment sum LD. )

Survival time defined as time from date of randomization to date of death. In the absence of confirmation of death, survival time was censored to last date the subject known to be alive.

Time to disease progression is defined as the number of months from date of randomization to the date of first documentation of disease progression (PD).

A subject will be considered achieving an overall response if the subject has a sustained CR or PR for at least 4 weeks, confirmed by tumor assessments. (Complete Response (CR): Disappearance of all target lesions. Partial Response (PR): ≥ 30% decrease in the sum of the LD of target lesions, taking as reference the Pre-treatment sum LD. )

Number of patients alive or dead at 1 year. In the absence of confirmation of death, survival time was censored to last date the subject known to be alive.

Survival time defined as time from date of randomization to date of death. In the absence of confirmation of death, survival time was censored to last date the subject known to be alive. Zero subjects analyzed indicates median could not be analyzed based on number of subjects who died.

Number of subjects that had at least one Treatment-Emergent Adverse Event (TEAE) that led to a dose reduction. TEAE includes all reported Adverse Events that occurred within 30 days of last study medication.

Relative dose intensity for a cycle was calculated as the percentage of the actual dose intensity of the cycle divided by the planned dose intensity of the cycle. Overall relative dose intensity was calculated as the average relative dose intensities over all cycles. (Dose intensity for each cycle was calculated as the actual dose level of the study medication received in that cycle divided by the number of weeks in the cycle.)

Modified irinotecan plus bolus 5-FU/LV (mIFL) with celecoxib

Modified irinotecan plus bolus 5-FU/LV (mIFL) with placebo

Irinotecan plus capecitabine (CapeIRI) with celecoxib

Irinotecan plus capecitabine (CapeIRI) with placebo

Bevacizumab + Irinotecan plus infusional 5-FU/LV (FOLFIRI) with celecoxib

Bevacizumab + Irinotecan plus infusional 5-FU/LV (FOLFIRI) with placebo

Bevacizumab + Modified irinotecan plus bolus 5-FU/LV (mIFL) with celecoxib

Bevacizumab + Modified irinotecan plus bolus 5-FU/LV (mIFL)with placebo