function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 1],
    ['Alekseev, Vitalii I. & Drotikova, Anna M. & Rozhina, Viktoria I.', 1],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 1],
    ['Fabricius, Johann Christian', 1],
    ['Jelínek, Josef & Audisio, Paolo', 4],
    ['Lasoń, Andrzej & Ghahari, Hassan', 2],
    ['Lasoń, Andrzej & Hájek, Jiří & Jelínek, Josef', 6],
    ['Majka, Christopher & Webster, Reginald & Cline, Andrew', 1],
    ['Weber, Friedrich', 1],
    ['White, Adam', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);