function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bartels, Paul J. & Nelson, Diane R. & Kaczmarek, Łukasz', 2],
    ['Guil, Noemí', 3],
    ['Kaczmarek, Lukasz & Grobys, Daria & Kulpa, Adam', 2],
    ['Kaczmarek, Łukasz', 3],
    ['Kaczmarek, Łukasz & Michalczyk, Łukasz & Mcinnes, Sandra J.', 6],
    ['Li, Xiao-Chen & Wang, Da-Yong & Wang, Li-Zhi', 2],
    ['Michalczyk, Łukasz & Wełnicz, Weronika & Frohme, Marcus', 3],
    ['Morek, Witold & Suzuki, Atsushi C. & Schill, Ralph O.', 3],
    ['Moreno, Antonio & Roszkowska, Milena & García, Mario Alberto', 2],
    ['Pilato, Giovanni & Lisi, Oscar', 2],
    ['Pilato, Giovanni & Sabella, Giorgio & Lisi, Oscar', 2],
    ['Rocha, Alejandra M. & González-Reyes, Andrea X.', 4],
    ['Roszkowska, Daniel Adrian Ciobanu Milena & Kaczmarek, Łukasz', 2],
    ['Roszkowska, Milena & Stec, Daniel & Ciobanu, Daniel Adrian', 4],
    ['Tumanov, Denis V.', 6],
    ['Other (19)', 23]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=69)',
    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);