Methodology of Seasonal Waves of Respiratory Disorders survey conducted at respiratory outpatient clinics across India oleh Bharat Bhushan Sharma, Sheetu Singh, Krishna Kumar Sharma, K P Suraj, Tariq Mahmood, Kumar Utsav Samaria, Surya Kant, Nishtha Singh, Tejraj Singh, Aradhna Singh, Rajeev Gupta, Parvaiz A Koul, Sundeep Salvi, Virendra Singh, SWORD Study Group