function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chûjô, Michio', 3],
    ['Klausnitzer, Bernhard', 3],
    ['Klausnitzer, Bernhard Dr.', 5],
    ['Lewis, George', 2],
    ['Libonatti, María Laura', 4],
    ['Motschulsky, Victor de', 5],
    ['Pic, Maurice', 8],
    ['Ruta, Rafal', 4],
    ['Ruta, Rafał', 6],
    ['Ruta, Rafał & Kiałka, Agata', 11],
    ['Ruta, Rafał & Libonatti, María Laura', 2],
    ['Ruta, Rafał & Yoshitomi, Hiroyuki', 2],
    ['Watts, Chris H. S. & Cooper, Steven J. B. & Saint, Kathleen M.', 13],
    ['Yoshitomi, Hiroyuki', 12],
    ['Yoshitomi, Hiroyuki & Ruta, Rafał', 38],
    ['Other (5)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=124)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);