function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fairmaire, Léon & Raffray, A.', 1],
    ['Hernando, Carles & Aguilera, Pedro & Ribera, Ignacio', 1],
    ['Klausnitzer, Bernhard', 1],
    ['Klausnitzer, Bernhard Dr.', 13],
    ['Linder, J.', 1],
    ['Motschulsky, Victor de', 1],
    ['Nyholm, Tord', 18],
    ['Pic, Maurice', 1],
    ['Reitter, Edmund', 1],
    ['Ruta, Rafal', 1],
    ['Ruta, Rafał', 4],
    ['Yoshitomi, Hiroyuki Dr.', 15],
    ['Yoshitomi, Hiroyuki Dr. & Satô, Masataka Dr.', 41]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=99)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);