function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 1],
    ['Batelka, Jan & Hájek, Jiří', 2],
    ['Bologna, M. A. & Pinto, J. D.', 1],
    ['Bologna, Marco A. & Amore, Valentina & Pitzalis, Monica', 2],
    ['Bologna, Marco A. & Turco, Federica', 3],
    ['Fuessly, Johann Caspar', 1],
    ['Linnaeus, Carolus', 11],
    ['Pan, Zhao & Ren, Guodong', 10],
    ['Riccieri, Alessandra & Spagoni, Lucrezia & Bologna, Marco A.', 3],
    ['Ruchin, Alexaner B. & Egorov, Leonid V. & Alekseev, Sergei K.', 2],
    ['Schedl, W.', 2],
    ['Schrank, Franz von Paula', 3],
    ['Shapovalov, Andrey M.', 1],
    ['Straka, Jakub & Batelka, Jan & Pauly, Alain', 2],
    ['Sánchez-Vialas, Alberto & López-Estrada, Estefany Karen', 1],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    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);