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In R if you want to remove quickly one column you can assign NULL to it.
V2 V3 V4
Alzheimers_disease 1.9230836.03875 Other
Asthma 5.0847556.58559 Other
Bipolar_disorder 1.9169348.52667 Brain
Blood_pressure 6.2500063.01744 Other
BMI 1.0638311.44664 Other
Body_mass_index 4.3478366.66428 Other