function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 25],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 11],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 19],
    ['Info Flora', 37],
    ['Jarvis, Charlie', 16],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 28],
    ['Linnaeus, Carolus', 11],
    ['Llamas, Felix & Acedo, Carmen', 9],
    ['Melzer, H. & Barta, Th.', 4],
    ['Prunera-Olivé, Joan & Vorontsova, Maria S. & Williams, Emma V.', 3],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 3],
    ['Saarela, Jeffery M. & Peterson, Paul M. & Valdés-Reyna, Jesus', 16],
    ['Sokoloff, Paul C. & Freebury, Colin E. & Hamilton, Paul B.', 2],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Hohla, M. & Schröck, C.', 2],
    ['Williams, Emma Victoria & Elia Ntandu, John & Ficinski, Pawel', 2],
    ['Other (11)', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=200)',
    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);