function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Basu, Subhrangshu & Babu, Rahul & Siddique, Alfisa', 1],
    ['Beasley, Clark W. & Miller, William R.', 1],
    ['Daza, Anisbeth & Caicedo, Martín & Lisi, Oscar & Quiroga, Sigmer', 1],
    ['Kaczmarek, Łukasz', 6],
    ['Kaczmarek, Łukasz & Cytan, Joanna & Zawierucha, Krzysztof', 1],
    ['Kaczmarek, Łukasz & Jakubowska, Natalia & Michalczyk, Łukasz', 1],
    ['Kaczmarek, Łukasz & Michalczyk, Łukasz & Mcinnes, Sandra J.', 7],
    ['Lisi, Oscar & Binda, Maria Grazia & Pilato, Giovanni', 1],
    ['Meyer, Harry A.', 2],
    ['Pilato, Giovanni & Kiosya, Yevgen & Lisi, Oscar', 3],
    ['Pilato, Giovanni & Lisi, Oscar & Binda, Maria Grazia', 2],
    ['Stec, Daniel & Roszkowska, Milena & Kaczmarek, Łukasz', 1],
    ['Sugiura, Kenta & Matsumoto, Midori & Kunieda, Takekazu', 1],
    ['Zawierucha, Krzysztof & Dziamiecki, Jakub & Jakubowska, Natalia', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);