function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 15],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 10],
    ['Castillon, Jean-Philippe & Castillon, Jean-Bernard', 18],
    ['Haevermans, Thomas & Hetterscheid, Wilbert L. A.', 5],
    ['Haevermans, Thomas & Rouhan, Germinal & Hetterscheid, Wilbert', 123],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 30],
    ['Info Flora', 32],
    ['Jarvis, Charlie', 70],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 24],
    ['Linnaeus, Carolus', 60],
    ['Mugnai, Michele & Lazzaro, Lorenzo & Nuzzo, Luca Di', 17],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 15],
    ['Silva, Otávio Luis Marques Da & Cordeiro, Inês', 24],
    ['Steinmann, Victor W.', 17],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 11],
    ['Other (42)', 68]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=539)',
    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);