function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Breton, Gérard', 2],
    ['Clark, Paul F. & Ng, Peter K. L. & Fransen, Charles H. J. M.', 1],
    ['Dworschak, Peter C.', 1],
    ['Dworschak, Peter C. & Poore, Gary C. B.', 2],
    ['Henmi, Yumi & Itani, Gyo & Osawa, Masayuki & Komai, Tomoyuki', 1],
    ['Hyžný, Matúš', 2],
    ['Leach, William Elford', 1],
    ['Martin, Joel W. & Haney, Todd A.', 1],
    ['Ngoc-Ho, Nguyen', 3],
    ['Sepahvand, Vahid & Tudge, Christopher & Momtazi, Farzaneh', 1],
    ['Stimpson, William', 1],
    ['de Man, Johannes Govertus', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);