function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arambarri, Ana M. & Hernández, Marcelo P.', 1],
    ['Evarts-Bunders, Pēteris & Evarte-Bundere, Gunta', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 6],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 2],
    ['Info Flora', 9],
    ['Jarvis, Charlie', 11],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 7],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 3],
    ['Manzi, Aurelio & Paris, Pasqualino & Santucci, Bruno', 1],
    ['Peruzzi, Lorenzo & Galasso, Gabriele & Domina, Gianniantonio', 2],
    ['Pliszko, Artur', 1],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 1],
    ['Rim, Hojun & Lee, Minhyun & Song, Uhram', 2],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=61)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);