function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bartos, Emanuel', 1],
    ['Beasley, Clark W. & Miller, William R.', 1],
    ['Fontoura, Paulo & Pilato, Giovanni & Lisi, Oscar', 2],
    ['Guil, Noemí', 1],
    ['Gąsiorek, Piotr & Degma, Peter', 1],
    ['Kaczmarek, Łukasz', 5],
    ['Kaczmarek, Łukasz & Michalczyk, Łukasz & Mcinnes, Sandra J.', 12],
    ['Kiosya, Yevgen & Voncina, Katarzyna & Gasiorek, Piotr', 1],
    ['Li, Xiao-Chen & Wang, Da-Yong & Wang, Li-Zhi', 2],
    ['Li, Xiaochen', 3],
    ['Li, Xiaochen & Wang, Lizhi & Liu, Ying & Su, Lina', 2],
    ['Roszkowska, Milena & Grobys, Daria & Bartylak, Tomasz', 5],
    ['Voncina, Katarzyna & Kristensen, Reinhardt M. & Gasiorek, Piotr', 2],
    ['Wang, Hanping & Wang, Lizhi & Li, Xiaochen', 2],
    ['Wang, Lizhi', 4],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=49)',
    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);