function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 213],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 11],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 24],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 20],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 10],
    ['Info Flora', 29],
    ['Jarvis, Charlie', 32],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 22],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 11],
    ['Martinetto, Edoardo & Bertini, Adele & Mantzouka, Dimitra', 18],
    ['N. S & Ghahari, H. & F, Bassus & E, Camptothlipsis', 16],
    ['Smith, MacKenzie A. & Greenwalt, Dale E. & Manchester, Steven R.', 18],
    ['Suh, Soo-Jung', 21],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 14],
    ['de Laubenfels, David John', 10],
    ['Other (93)', 220]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=689)',
    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);