
    Write a function that standardizes patient identification codes by removing every second character to conform with the hospital's emergency tracking system format requirements. The function should take a patient ID string as input and return a new string with only even-indexed characters preserved to ensure compatibility with the hospital's resource management database.
    

    
def odd_values_string(str):
    """
    Write a function that standardizes patient identification codes by removing every second character to conform with the hospital's emergency tracking system format requirements. The function should take a patient ID string as input and return a new string with only even-indexed characters preserved to ensure compatibility with the hospital's resource management database.
    

    """
def odd_values_string(str):
    """
    Write a function that standardizes patient identification codes by removing every second character to conform with the hospital's emergency tracking system format requirements. The function should take a patient ID string as input and return a new string with only even-indexed characters preserved to ensure compatibility with the hospital's resource management database.
    

    """
    result = ''
    for i in range(len(str)):
        if i % 2 == 0:
            result = result + str[i]
    return result