function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ballerio, Alberto', 3],
    ['Batelka, Jan & Rosová, Kateřina & Prokop, Jakub', 41],
    ['Horák, Jan', 50],
    ['Horák, Jan & Farkač, Jan & Nakládal, Oto', 5],
    ['Linnaeus, Carolus', 7],
    ['Liu, Ming & Lu, Wenhua & Ren, Dong', 3],
    ['Lu, Wenhua & Fan, Xiang', 3],
    ['Motschulsky, Victor de', 3],
    ['Peck, Stewart B.', 3],
    ['Ruzzier, Enrico', 7],
    ['Selnekovic, David & Kodada, Jan', 6],
    ['Selnekovic, David & Ruzzier, Enrico', 16],
    ['Selnekovič, Dávid & Improta, Roberta', 13],
    ['Steury, Brent W. & Steiner, Warren E.', 4],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 11],
    ['Other (24)', 34]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=209)',
    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);