function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Lee, Jie Ying & Nasir, Nurul Syafiqah', 1],
    ['Marzuki, Mohammad Effendi bin & Liew, Thor-Seng', 1],
    ['Nahok, Benchawan & Tumpeesuwan, Sakboworn', 9],
    ['Nurinsiyah, Ayu Savitri & Neiber, Marco T. & Hausdorf, Bernhard', 29],
    ['Páll-Gergely, Barna & Hunyadi, András & Asami, Takahiro', 1],
    ['Páll-Gergely, Barna & Hunyadi, András & Hausdorf, Bernhard', 2],
    ['Tumpeesuwan, Chanidaporn & Tumpeesuwan, Sakboworn', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    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);