function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gerovasileiou, Vasilis & Rosso, Antonietta', 8],
    ['Grischenko, Andrei V. & Dick, Matthew H. & Mawatari, Shunsuke F.', 1],
    ['HAYWARD, PETER J. & McKINNEY, FRANK K.', 1],
    ['Ramalho, Laís V. & Muricy, Guilherme & Taylor, Paul D.', 1],
    ['Ryland, John S. & Holt, Rohan & Loxton, Jennifer', 3],
    ['Souto, Javier & Kaufmann, Manfred J. & Canning-Clode, João', 2],
    ['Taylor, Paul D. & Tan, Shau-Hwai Aileen', 1],
    ['Tompsett, Scott & Porter, Joanne S. & Taylor, Paul D.', 3],
    ['Zágoršek, K. & Fordinál, K.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);