function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cock, Matthew J. W. & Congdon, T. Colin E. & Collins, Steve C.', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Fischer, Wagner & Faria de Godoi, Raquel', 1],
    ['Harvey, Michael B. & Ugueto, Gabriel N. & Gutberlet, Ronald L.', 1],
    ['Idrees, Muhammad & Zhang, Zhiyong & Jiao, Yongqing & Zheng, Xu', 2],
    ['Jarvis, Charlie', 3],
    ['Mwachala, Geoffrey & Fischer, Eberhard', 1],
    ['Ribeiro-Júnior, Marco A. & Amaral, Silvana', 1],
    ['Takawira-Nyenya, Ratidzayi & Thiede, Joachim & Mucina, Ladislav', 15],
    ['Vaníčková, Lucie & Pompeiano, Antonio & Maděra, Petr', 1],
    ['Wilkin, Paul & Suksathan, Piyakaset & Keeratikiat, Kaweesak', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);