function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dawah, Hassan A. & Abdullah, Mohammed A. & Ahmad, Syed Kamran', 1],
    ['Harbach, Ralph E. & Howard, Theresa M.', 1],
    ['Harbach, Ralph E. & Wilkerson, Richard C.', 6],
    ['Merabti, B. & Boumaza, M. & Ouakid, M. L.', 1],
    ['NATARAJAN, R. & GOPALAKRISHNAN, S. & SHRIRAM, A. N.', 17],
    ['Rivera-García, Karina D. & Rísquez-Pérez, Abril', 1],
    ['Rozo-Lopez, Paula & Mengual, Ximo', 18],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);