function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 46],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 2],
    ['Essl, F.', 1],
    ['Grabovskaya-Borodina, Alisa E. & Illarionova, Irina D.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 13],
    ['Info Flora', 15],
    ['Ito, Yu & Barfod, Anders S.', 2],
    ['Jarvis, Charlie', 4],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 14],
    ['Kvaček, Zlatko & Teodoridis, Vasilis & Radoň, Miroslav', 1],
    ['Monteiro, Francisca & Costa, Esperança Da & Kissanga, Raquel', 1],
    ['Moraes, Pedro Luís Rodrigues De & Dobreff, James', 1],
    ['Oliveira, Adriana & Bove, Claudia', 2],
    ['Persoon, Christiaan Hendrik', 1],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Wittmann, H. & Hohla, M.', 2],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=110)',
    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);