function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Angus, Robert B & Sadílek, David & Shaarawi, Fatma', 1],
    ['Bird, Matthew S. & Bilton, David T. & Perissinotto, Renzo', 3],
    ['Darilmaz, Mustafa C. & Ahmed, Zubair', 2],
    ['Darilmaz, Mustafa C. & İncekara, Ümit', 4],
    ['Ribera, Ignacio & Hernando, Carles & Cieslak, Alexandra', 1],
    ['Rogers, D. Christopher & Cruz-Rivera, Edwin', 1],
    ['Short, Andrew E. Z. & Fikáček, Martin', 3],
    ['Takiya, Daniela Maeda & Santos, Allan Paulo Moreira', 6],
    ['Webster, Reginald P. & Sweeney, Jon D.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);