function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 3],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 1],
    ['Francisco-Gutierrez, Antonio & Chazaro-Basanez, Miguel', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 17],
    ['Info Flora', 17],
    ['Jarvis, Charlie', 10],
    ['Jung, Ming-Jer', 2],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 15],
    ['Krahulec, František & Kirschner, Jan & Krahulcová, Anna', 3],
    ['Linnaeus, Carolus', 21],
    ['Persson, Claes & Eriksen, Bente & Pérez, Álvaro J.', 3],
    ['Rabuske-Silva, Cassio & Iganci, João Ricardo Vieira', 2],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 3],
    ['Ricigliano, Vincent & Kumar, Santosh & Kinison, Scott', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=108)',
    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);