function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Do, Duc Sang & Do, Van Nhuong', 1],
    ['Foon, Junn Kitt & Clements, Gopalasamy Reuben & Liew, Thor-Seng', 7],
    ['Inkhavilay, Khamla & Sutcharit, Chirasak & Bantaowong, Ueangfa', 2],
    ['Páll-Gergely, Barna & Hunyadi, András & Grego, Jozef', 12],
    ['Páll-Gergely, Barna & Reischütz, Alexander & Maassen, Wim J. M.', 11],
    ['Sang, Do Duc', 2],
    ['Tanmuangpak, Kitti & Dumrongrojwattana, Pongrat', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    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);