function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahmed, Shakoor & Julka, Jatinder Mohan & Banerjee, Dhriti', 2],
    ['Kharkongor, Ilona J.', 2],
    ['Rodingpuia, Christopher & Hmar, Lalthanzara & Julka, Jatinder', 1],
    ['Tiwari, Nalini & Lone, Azhar Rashid & Thakur, Samrendra Singh', 3],
    ['Tiwari, Nalini & Paliwal, R. & Rashid, Azhar & Yadav, Shweta', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);