
    Write a function to clean medical record identifiers by removing characters at odd positions in the data string, which represent noise artifacts from the health monitoring system's collection process. The resulting standardized format will be used for accurate patient data analysis in the early disease detection system.
    

    
def remove_odd(str1):
    """
    Write a function to clean medical record identifiers by removing characters at odd positions in the data string, which represent noise artifacts from the health monitoring system's collection process. The resulting standardized format will be used for accurate patient data analysis in the early disease detection system.
    

    """
def remove_odd(str1):
    """
    Write a function to clean medical record identifiers by removing characters at odd positions in the data string, which represent noise artifacts from the health monitoring system's collection process. The resulting standardized format will be used for accurate patient data analysis in the early disease detection system.
    

    """
    str2 = ''
    for i in range(1, len(str1) + 1):
        if i % 2 == 0:
            str2 = str2 + str1[i - 1]
    return str2