function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Jarvis, Charlie', 3],
    ['Luu, Hong Truong & Nguyen-Phi, Nga & Nguyen, Quoc Dat', 1],
    ['Naive, Mark Arcebal K. & Hein, Khant Zaw', 1],
    ['Nguyen, Van Du & Toan, Le Chi & Nguyen, Van Dinh & Tam, Minh', 18],
    ['Van, Hong Thien & Le, Van Son & Nguyen-Phi, Nga', 3],
    ['Wong, Sin Yeng & Joling, Jyloerica', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);