function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 10],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 29],
    ['Ferrer-Gallego, P. Pablo & Laguna, Emilio & Alonso, Ángeles', 2],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 18],
    ['Info Flora', 15],
    ['Jarvis, Charlie', 49],
    ['Jeanmonod, Daniel', 2],
    ['Jeanmonod, Daniel & Schlüssel, André', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 13],
    ['Li, Houhun & Sattler, Klaus', 1],
    ['Linnaeus, Carolus', 30],
    ['Nualart, Neus & Soriano, Ignasi & Prieto, David Pérez', 1],
    ['Prins, Jurate De & Davis, Donald R. & Coninck, Eliane De', 4],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 6],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 4],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=186)',
    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);