Call Trisha: A guide how to get the phone number

Beware! Spoilers!
I've made this guide, because I was really curious how you've got to find out what Trisha's number is. It isn't the number on the green memo. No, her real number is hidden everywhere in the game. This guide will show you where and how you can obtain the numbers.

The first two digits are pretty hard to find. Start the game and play the Heart Transplant in the Surgery mode (normal). Go to the bag of blood that's hanging there and stab it with a scalpel. The blood will leak out and in the bag is a note with the first two digits: 09.

Select the Kidney Transplant in the Surgery mode (normal). On your left hand, there is a pill bottle. Pick it up and look inside of that bottle. On the inside bottom, you'll see another number: 93!

Select the Brain Tranplant in the Surgery mode (normal). On your right hand, there is a laser machine and there also is a green syringe. Touch the point of the needle with your finger, so you drug yourself. When drugged, take a look at the laser machine! The screen gives two other digits: 26.

Go to the Heart transplant in the Ambulance mode. On your right hand, there is a little cabinet. You can open it by touching it, or you can wait untill the propane tank inside there will fall against the door and it opens. Use the laser on the paper that's on the door. It'll burn in the paper and another number becomes visible: 07!

This one is a tough one. Go to ambulance mode, then the kidney transplant and then grab the my-pad. When you get the my-pad under a certain angle, a number will brighten up. The number is 18.

This one is visible for a really short amount of time. Go in ambulance mode and then choose the brain surgery. Look outside when the doors open and you'll notice a difference with the two other ambulance mode operations, there is a number on the road: 50.

Note: There is no 50 on the road in any other ambulance mode operations

So, when we put al the numbers in place, you'll eventually get this:
Heart Transplant (Surgery mode): 09
Kidney Tranplant (Surgery mode): 93
Brain Tranplant (Surgery mode): 26
Heart Transplant (Ambulance mode): 07
Kidney Tranplant (Ambulance mode): 18
Brain Tranplant (Ambulance mode): 50

Her phone number is 099326071850! Insert these numbers on the phone in the reception and press the green "call" button!

Thanks to Squibo5 and Knightsar(02)!