function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 40],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 19],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 3],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 33],
    ['Info Flora', 39],
    ['Jang, Hyun-Do & Hyun, Chang-Woo & Ryu, Seah & Lee, Sang-Jun', 5],
    ['Jang, Ju Eun & Park, Jong-Soo & Jung, Ji-Young & Kim, Dong-Kap', 5],
    ['Jarvis, Charlie', 89],
    ['Khan, Nazar & Fritsch, R. M. & Sultan, Amir & Khan, Tahir', 4],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 28],
    ['Linnaeus, Carolus', 61],
    ['Lowry, J. K. & Stoddart, H. E.', 14],
    ['Matov, Alexej & Zahiri, Reza & Holloway, Jeremy D.', 3],
    ['Nacoulma, Blandine M. I. & Schmidt, Marco & Hahn, Karen', 5],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 24],
    ['Other (75)', 107]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=479)',
    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);