function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chan, Benny K. K. & Cheang, Chi Chiu', 3],
    ['Pitriana, Pipit & Valente, Luis & von Rintelen, Thomas', 1],
    ['Pochai, Ashitapol & Kingtong, Sutin & Sukparangsi, Woranop', 2],
    ['Ross, A. & Perreault, Ray T.', 1],
    ['Sukparangsi, Woranop & Pochai, Ashitapol', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    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);